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Joining processes — Tools and materials

Course: Joining processes Module: Tools and materials Target group: vocational learners in Blacksmithing, Artistic metalwork and related forge practice Selected jurisdiction: United Kingdom — England as the vocational-training jurisdiction. Occupational-safety references use the Health and Safety Executive framework for Great Britain only as it applies in England. Northern Ireland is outside this module, and training pathways in Scotland and Wales are not used for qualification claims here. Language: English Current-source check: 1 September 2026 Review status: openly licensed learning draft, ready for review by a competent blacksmithing educator, welding specialist, workplace health-and-safety lead and accessibility reviewer.

Priority rule: This aiMOOC supports learning; it does not authorise hazardous work. Current law, regulator guidance, the employer's risk assessment, COSHH assessment, safe system of work, equipment manufacturer's instructions and direct workplace or college instructions take precedence. Never carry out hot work, welding, oxy-fuel work, powered-machine work or other hazardous forge operations unsupervised unless your workplace has formally assessed you as competent and authorised you for that task.

Cross-country rule: No apprenticeship, welder qualification, safety duty, standard or job title in this course should be treated as automatically equivalent in another country.

Open licensing note: The original learning text is intended for reuse as Open Educational Resources under CC BY-SA 4.0, subject to MOOCwiki terms. Wikimedia Commons files retain the licence shown on their individual file pages. Embedded YouTube videos remain under the publisher's own terms and are not automatically open-licensed.

Image reading: A smith controls hot stock at the anvil. Before thinking about the joint itself, notice the dependency between safe grip, stable support, working distance, heat awareness and controlled striking.

Introduction

Joining in blacksmithing is more than making two pieces stay together. A successful joint must fit the design, the material, the load path, the visual language of the piece, the available tools, the required finish and the competence of the people doing the work. In artistic metalwork, a joint can be deliberately visible and decorative; in repair or architectural work, it may have to satisfy a drawing, conservation brief, welding procedure, inspection requirement or contractual standard.

For an England-based vocational learner, the current Skills England Blacksmith occupational standard ST0378 version 1.1 describes the occupation as designing, shaping and joining metal components by hot forging and other metalworking processes. It explicitly includes hot forging, thermal welding and cutting, bench work, fastening systems, and preparation and maintenance of tools, materials and equipment. The standard is Level 3 and is currently approved for delivery. Skills England: Blacksmith ST0378 v1.1

This module concentrates on the tools and materials needed to plan, prepare, make and inspect joints. It links traditional blacksmith joinery with modern fabrication methods without treating one as universally superior. Your task is to choose the process that meets the design and safety requirements with the least unnecessary risk, waste and rework.

Learning outcomes

By the end of the module, you should be able to explain how joint function affects process choice; identify common hand tools, holding tools, forming tools, welding equipment and extraction controls; distinguish parent metal, filler metal, fasteners, fluxes, gases and coatings; plan a supervised joining operation from drawing to inspection; recognise stop-work conditions; evaluate common joining defects; document quality evidence; and propose lower-waste alternatives without compromising function or safety.

Jurisdiction, authority and qualification boundary

The selected jurisdiction is the United Kingdom, with England used for vocational training. The following authorities and scopes are kept separate:

Area	Authority or source used here	Scope in this module
Occupational safety	Health and Safety Executive	Great Britain rules and guidance applied to workplaces in England
Vocational occupational standard	Skills England	England only; Blacksmith ST0378 version 1.1
National standards	British Standards Institution	UK national standards body; standards apply only when required by law, contract, specification, employer or client

HSE states that welding fume presents serious health risks and that exposure must be controlled. The current guidance expects employers to assess welding risk and use suitable controls such as local exhaust ventilation where appropriate, with suitable respiratory protective equipment where engineering controls do not adequately control exposure or are not reasonably practicable. HSE: Welding fume — protect your workers HSE: Controlling the risks from welding

HSE's PUWER guidance applies to work equipment and requires equipment provided for work to be suitable, maintained, inspected where necessary and used by people who have received adequate information, instruction and training. HSE: PUWER overview

For portable oxy-fuel equipment, HSE guidance addresses cylinders, regulators, hoses, non-return valves, flashback arresters, ventilation, fume and competent use. Do not infer gas pressures, lighting sequences or emergency actions from this course; follow the current workplace procedure and the equipment manufacturer's instructions. HSE: Safety in gas welding, cutting and similar processes

BSI lists BS EN ISO 9606-1:2017 as the current UK standard for qualification testing of welders for fusion welding of steels. It is a qualification-testing standard, not an automatic legal requirement for every blacksmithing task. Use it only when the job, employer, client, contract or applicable product standard requires it. BSI: ISO 9606 series

The BS EN ISO 3834 series covers quality requirements for fusion welding of metallic materials. Again, its use depends on the product, organisation, contract and applicable requirements; this module does not claim that every piece of artistic ironwork must be produced under ISO 3834. BSI: ISO 3834 series

Core Concepts

What a joint has to do

A joint should be selected against several requirements at once. In craft practice, these requirements include load transfer, stiffness, fatigue or vibration behaviour, movement or adjustment, corrosion exposure, repairability, visual intent, heritage compatibility, heat effects, access for tools, production time and inspection method.

A decorative gate may use hot rivets because the heads become part of the visual rhythm. A conservation repair may require traditional material and reversible intervention. A workshop jig may use bolts because fast disassembly matters. A fabricated bracket may use MIG or MAG welding because continuity and production speed matter. A forged grille may combine mortise-and-tenon joints, collars and rivets because the joinery is intended to remain visible.

Process families

Process family	Typical blacksmithing examples	Main joining principle	Key tool question	Key material question
Mechanical fastening	Hot rivets, cold rivets, bolts, screws	Clamping, upsetting or threaded engagement	Can the joint be supported, aligned and headed safely?	Is the fastener material and size correct for the design?
Forged joinery	Mortise and tenon, collaring, wrapped joints	Geometric interlock plus forged fit	Are punches, drifts, sets and formers sized to the stock?	Is there enough parent metal to form the joint without excessive thinning?
Forge welding	Scarf welds, lap welds, chain links, composite forged elements	Solid-state bonding under heat and pressure	Can the stock be heated uniformly and handled securely?	Are the steels compatible and clean enough for the specified procedure?
Fusion welding	MMA, MIG, MAG, TIG, oxy-fuel welding	Local melting of parent and often filler metal	Is the equipment set up, maintained, extracted and screened for the task?	Are filler, gas and parent material correctly matched and identified?
Brazing and soldering	Decorative non-ferrous details, repair or assembly where appropriate	Filler metal melts while parent metal remains solid	Can heat be controlled without damaging surrounding work?	Is the filler and flux compatible with the parent metals and service conditions?

Traditional and modern terminology

In UK blacksmithing, mild steel commonly means readily forgeable low-carbon steel used for general ironwork. It is not the same material as historic wrought iron. Genuine wrought iron has a fibrous slag-bearing structure and behaves differently in forging and conservation. Do not label modern mild-steel stock as wrought iron merely because the finished object looks traditional.

The terms MIG and MAG are widely used in UK fabrication education. Both are gas-shielded wire processes; MIG uses an inert shielding gas while MAG uses an active shielding gas. International sources may group them under GMAW. MMA is the common UK term for manual metal arc welding; it is also called stick welding. TIG is tungsten inert gas welding.

Forge welding or a blacksmith's weld joins suitably prepared hot surfaces by hammering or pressing them together at an appropriate welding heat. The joint preparation is often called a scarf. The exact heat, flux choice and sequence depend on material, section and shop method and must be taught hands-on by a competent instructor.

Tools and Equipment

Hand and holding tools

The most important principle is not owning the largest set of tools; it is matching the tool to the work. Tongs must hold the actual section securely, hammers must suit the operation and the user, punches and drifts must match the hole or mortise, and supports must keep the joint stable while preserving a safe body position.

Tool-reading activity: Compare the jaw geometry with the stock you intend to hold. A tong that only touches at one point can rotate unexpectedly; a correctly fitted tong controls the work without excessive grip force.

Tool	Practitioner use	Selection check	Common unsafe or poor-quality condition
Blacksmith's tongs	Carry and control hot stock	Jaw profile matches flat, square, round or irregular section	Slipping stock, twisted reins, loose rivet, unsuitable jaw contact
Hand hammer	Draw, upset, set, rivet and finish	Face condition, mass and peen suit the task and user	Mushroomed face, damaged handle, excessive hammer weight
Sledgehammer	Striking under a coordinated team system	Clear commands, trained striker, suitable hammer and stance	Uncoordinated striking or unclear communication
Punch and drift	Create or size holes and mortises in hot stock	Correct section, taper and condition	Bent tool, mushroomed head, wrong size, poor support
Rivet set and bolster	Form or support rivet heads	Matches head form and rivet diameter specified	Misalignment, cracked tool, unsupported work
Swage or former	Control repeated shapes, collars or profiles	Correct radius and robust support	Improvised weak former or trapped-hand zone
Vice and clamps	Hold fit-up for drilling, welding or assembly	Capacity and access suit work	Clamp in line of heat, unstable projection or damaged jaws
Wire brush and scraper	Remove scale and surface contamination	Correct tool for hot or cold use	Loose wires, wrong eye protection or use near rotating equipment

Powered preparation and fabrication equipment

Powered tools may include angle grinders, pedestal grinders, drills, saws, power hammers, presses and welding power sources. Under PUWER, workplace equipment must be suitable and managed for safe use. Guards, emergency controls, isolation, inspection and competence requirements are not optional workshop details.

Image reading: Grinding produces a spark stream, airborne particles, noise and a high-energy rotating-tool hazard. Control the workpiece, guard, disc selection, exclusion zone and eye/face protection according to the risk assessment and manufacturer instructions. Do not use a grinder as a substitute for accurate fit-up.

Fusion-welding equipment

A typical MIG or MAG set includes a power source and wire-feed unit, welding gun, contact tip, drive rolls, work return lead and clamp, shielding-gas supply where required, and fume-control equipment. MMA uses a power source, electrode holder, work return and suitable electrodes. TIG adds a non-consumable tungsten electrode and separate filler wire where required.

Diagram reading: The diagram distinguishes the electrode wire, shielding gas, molten weld metal, solidified weld metal and workpiece. For inspection, you must think about both what is visible at the surface and what has happened through the joint section.

Learning point: Welding practice belongs in a controlled training bay with screens, extraction and competent supervision. Arc light can injure bystanders as well as the welder.

Oxy-fuel equipment

Oxy-fuel systems may be used for heating, cutting, brazing and some welding. A portable set can include oxygen and fuel-gas cylinders, pressure regulators, correctly identified hoses, flashback arresters, non-return valves, a torch or blowpipe, suitable nozzles, a spark igniter, cylinder restraints and a trolley.

Diagram reading: The image shows a structured oxy-gas station with cylinders restrained and protective equipment included. Use it as a visual orientation only. Your own set must follow current HSE guidance, manufacturer instructions and workplace configuration.

Do not use oil or grease on oxygen fittings. Do not improvise adapters, hose repairs or regulator combinations. Damaged or suspect gas equipment must be taken out of service and reported.

Fume-control equipment

Welding-fume control may include on-torch extraction, movable capture hoods, extracted benches or booths, general mechanical ventilation and suitable RPE where required by the assessment. LEV should capture fume close to source without disrupting the process.

This HSE video shows practical guidance for on-torch extraction:

This HSE video shows an extracted bench:

This HSE video shows a movable LEV hood:

Observation task: In each video, identify where the contaminant is generated, where the extraction inlet is placed, what could disturb capture and how the control protects people nearby as well as the person welding.

Materials and Consumables

Parent metals

Material	Typical use in artistic metalwork	Joining considerations	Identification warning
Mild steel	Gates, railings, brackets, furniture, sculpture	Generally forgeable and weldable when the grade and condition are suitable	Do not assume unknown scrap is mild steel
Historic wrought iron	Conservation and heritage repair	Fibrous structure can influence forging, welding and conservation strategy	Do not substitute modern mild steel without approval of the conservation brief
Stainless steel	Contemporary details, exterior work, mixed-material designs	Grade, shielding, filler and contamination control matter	Welding fume may contain chromium and nickel; COSHH controls are essential
Copper and copper alloys	Decorative accents, straps, collars and non-ferrous details	Heat conductivity and alloy composition affect process choice	Brass and bronze are not interchangeable names
Cast iron	Historic components and repairs	Repair can be specialist and material-sensitive	Do not treat cast iron as mild steel

Material identity matters before heat is applied. Coatings, galvanising, lead paint, plating, oils, degreasers and unknown contamination can create severe hazards during hot work. If the material or coating is unknown, stop and have it identified through the workplace procedure.

Fasteners

Rivets for blacksmithing are commonly selected by shank diameter, material, head form and grip requirement. The allowance needed to form the second head depends on the specified head form, stock stack and workshop method. Do not rely on a memorised universal multiplier; use the drawing, approved shop rule or instructor's procedure.

Bolts and screws can provide serviceable or removable joints. Their grade, thread, washers, locking method, corrosion protection and tightening requirement must match the design.

Filler metals and electrodes

Fusion-welding consumables must match the parent material and the required procedure. This includes MIG or MAG wire, MMA electrodes, TIG filler rod and oxy-fuel welding rod. Store consumables as their manufacturer requires; contamination, moisture or incorrect identification can cause defects.

In a coded or procedure-controlled job, the welding procedure specification, drawing and consumable classification take precedence over general workshop preference.

Fluxes

Flux may help dissolve or exclude oxides in forge welding, brazing or soldering. It is a chemical product and should be selected through the process specification and COSHH assessment. Use only products approved by the workplace or instructor. Never improvise mixtures, and avoid the assumption that adding more flux corrects poor preparation.

Shielding and fuel gases

Shielding gases may include argon or process-specific argon mixtures. Fuel gases may include acetylene or propane depending on the equipment and task. Gas choice affects process performance and equipment configuration. Cylinders, regulators, hoses and safety devices are gas-specific; do not interchange equipment unless the manufacturer and workplace procedure explicitly permit it.

Surface coatings and finishes

A joint is not complete until its surface treatment is considered. Typical blacksmith finishes include wire-brushed scale, wax or oil systems for appropriate indoor work, paint systems, powder coating, zinc-based protection and specialist finishes. Surface preparation must be compatible with the coating system and the service environment.

Never heat, weld or grind through an unknown coating merely to save preparation time. The coating may contain substances that require special control or specialist removal.

Choosing a Joining Process

Selection matrix

Design question	If the answer is yes	Process implication
Must the joint remain visually traditional?	Visible joinery is part of the design	Consider rivets, collars, mortise-and-tenon or forge welding
Must the assembly be removable for maintenance?	Disassembly is required	Consider bolts or another designed mechanical fastening
Is heat likely to damage a finish, historic fabric or adjacent material?	Heat sensitivity is high	Prefer a cold or lower-heat process where technically suitable
Is the work subject to a welding procedure or product standard?	Formal welding requirements apply	Follow the specified process, qualification and inspection route
Is fume elimination reasonably practicable?	A cold joint can meet the design	Consider mechanical fastening before thermal joining
Is the joint highly visible as craft detail?	Appearance carries design value	Evaluate head form, collar proportion, hammer finish and symmetry

A good craft decision is not simply the strongest possible joint. It is the joint that is fit for purpose, can be made safely and repeatably, meets the drawing or conservation brief, and uses no more energy, material or post-processing than necessary.

Authentic Workshop Examples

Example: riveted garden gate panel

A traditional-looking mild-steel gate may use hot rivets to attach decorative bars to rails. The rivet head can be intentionally visible. The work requires accurate hole position, controlled fit-up, a rivet that matches the design, suitable tongs, a bolster or backing tool and a set for the required head form.

A UK artist blacksmith demonstrates hot riveting on a gate in this video:

Use this video as an observation resource, not as authorisation to copy the operation without instruction. Record the sequence, tool roles and communication between people.

Example: collared grille intersection

In an ornamental grille, a forged collar can wrap around crossing bars and become part of the design. Good collars fit tightly without looking crushed, keep the bars in alignment and repeat consistently across the grille. Tooling may include a former, swage, hammer, tongs and a controlled fit-up jig.

Example: mortise-and-tenon frame

A tenon forged on one bar passes through a mortise in another. The tenon may then be upset or secured as the design requires. The quality depends on material allowance, accurate shoulder placement, a clean mortise, correct support and controlled upsetting. A loose mortise cannot be rescued by excessive hammering without distorting the work.

Example: welded hidden bracket

A contemporary metalwork piece may contain a welded bracket hidden from normal view. The joint may be efficient, but its quality still depends on material identification, preparation, fit-up, welding parameters set through the workplace procedure, fume control, distortion control and inspection. Grinding the weld completely flush can remove necessary weld metal if the design did not allow for it.

Risk Controls

Hierarchy of control for joining work

Start with the possibility of eliminating the hazardous process. If a mechanical joint can satisfy the design, it may avoid welding fume entirely. If thermal joining is necessary, reduce exposure by process and material choice, then apply engineering controls such as LEV, followed by administrative controls and suitable PPE or RPE as required. PPE does not replace effective engineering control.

Main hazards and controls

Hazard	Where it appears	Control principle	Stop-work trigger
Welding fume	MIG, MAG, MMA, TIG, gas welding and allied hot work	Risk assessment, process choice, source extraction, ventilation and suitable RPE where required	No assessed fume control or failed extraction
Harmful coatings	Galvanised, painted, plated or contaminated stock	Identify and manage coating before hot work	Unknown coating or contamination
Arc radiation	Arc welding	Suitable welding eye and face protection, clothing and compliant screens	Missing or damaged screen or eye protection
Fire and hot metal	Forge, hot riveting, welding, grinding	Hot-work area, combustibles control, marked hot-stock zone and fire arrangements	Uncontrolled combustible material or unclear hot-stock handling
Compressed gases	Oxy-fuel equipment	Correct equipment, restraints, inspection, flashback protection and trained use	Damaged hose, suspect regulator, missing required safety device or leak
Rotating machinery	Grinders, drills, saws	Guarding, correct consumable, secure work, exclusion of entanglement hazards and trained use	Damaged wheel or disc, missing guard or insecure workpiece
Impact and flying scale	Forging, riveting, slag removal	Tool inspection, eye protection, clear striking zone and stable work	Mushroomed striking tool or uncontrolled bystander access
Noise	Hammering, grinding, power hammering	Assess exposure, reduce at source and use hearing protection where required	Required hearing control unavailable
Manual handling	Stock, anvils, cylinders, gates and fixtures	Avoid hazardous lifts, use aids and team handling where assessed	Load or route exceeds assessed capability
Hot enclosed items	Tanks, drums, sealed sections and unknown containers	Formal specialist hot-work controls, cleaning, testing and permit systems	Container status unknown or not formally cleared

PPE and RPE

PPE is selected from the risk assessment, not from habit. Depending on the task, it can include safety footwear, suitable eye protection, welding helmet or shield, flame-resistant clothing, gloves, hearing protection and face protection. RPE for welding fume requires a managed selection process. Tight-fitting facepieces require face-fit testing and suitable facial-hair conditions; powered systems may be chosen where appropriate. Compatibility between helmet, RPE, eyewear and hearing protection must be checked.

Do not use loose synthetic clothing, damaged gloves or contaminated PPE near hot work. Gloves reduce risk but do not make hot stock safe to touch.

Step-by-Step Demonstration

Instructor-led hot-riveted lap joint

This demonstration is designed for a controlled college or workplace forge. Learners who are not authorised for hot work should observe, complete the cold fit-up stages or use a non-hot simulation.

Read the job information. Confirm the drawing, joint location, material identity, rivet specification, finish and quality criteria before collecting tools.
Confirm the safe system. The instructor checks the risk assessment, hot-work area, fire controls, ventilation, access, PPE, communication and any required permit arrangements.
Inspect the stock. Use known, clean mild-steel practice pieces. Stop if the metal has an unknown coating, plating, grease, paint or other contamination.
Select tools. Prepare matched tongs, hammer, rivet set, bolster or backing tool, clamps, measuring tools and the approved heating equipment. Defective tools are removed from service.
Prepare the holes. Under the relevant machine or hot-punching procedure, make holes to the drawing, remove burrs as required and confirm that the holes align without forcing.
Dry-fit the joint. Clamp the two pieces in final alignment and confirm dimensions. Check that the rivet specified by the drawing or instructor has the required grip and forming allowance.
Plan the team roles. Identify who handles the hot rivet, who supports or bucks it, who forms the head and what words or signals stop the operation.
Heat under instructor control. The authorised person heats the rivet using the approved forge or heating method. Learners do not improvise a temperature, fuel setting or lighting sequence.
Insert and support. The hot rivet is transferred with suitable tongs, placed through the aligned holes and immediately supported on the specified bolster or existing head.
Upset the tail. Controlled blows shorten and spread the projecting shank. The striker stays square to the work and avoids glancing blows toward a partner.
Finish the head. Use the correct rivet set or hammer technique to form the specified head without crushing the surrounding bars.
Control cooling. Move or mark the assembly as hot and allow it to cool by the approved method. Do not quench by habit if the procedure does not call for it.
Inspect. Check that plates are drawn together, the head is seated and centred, the assembly is aligned, and there are no visible cracks, damaging dents or unintended distortion.
Record and review. Compare the joint with the sample or drawing, record defects, decide whether rework is permitted and return tools and waste to the correct storage streams.

Quality question: What evidence shows that the rivet has actually clamped the joint rather than only produced an attractive head?

Common Errors and Corrections

Error	Likely effect	Better practice
Using unknown scrap for a hot process	Unexpected material behaviour or hazardous fume	Identify material and coatings before work
Tongs do not match the stock	Loss of control, twisted work or dropped hot metal	Fit or select tongs that grip the actual section securely
Holes are forced into alignment	Distortion and residual stress	Correct marking, drilling or punching so fit-up is natural
Rivet projection is guessed	Underfilled or oversized second head	Use the drawing or approved shop rule for that head form
Collar is too loose	Visible gap and weak restraint	Improve stock allowance, former size and fitting sequence
Mortise is oversized	Loose joint and poor shoulder seating	Control punch and drift progression to the intended size
Forge-weld surfaces are dirty or poorly scarfed	Inclusion, seam or incomplete bond	Prepare the surfaces and geometry before the welding heat
Welding begins without fume control	Uncontrolled exposure to hazardous fume	Stop and establish the assessed control measures first
Weld is over-ground	Reduced section and loss of designed weld metal	Grind only to the finish and profile specified
Welding consumables are mixed or unlabelled	Uncertain weld properties and traceability	Keep consumables identified and stored to procedure
Hot work is placed in an unmarked cold-work area	Burn or fire risk	Maintain a clearly defined hot-stock zone

Quality Criteria

Fit, function and appearance

A vocational-quality joint should be assessed against the drawing, sample, specification or conservation brief. "Looks good" is not enough.

Criterion	Evidence to look for
Dimensional accuracy	Joint and assembly dimensions within the specified tolerance
Alignment	Bars, frames and repeated elements follow the intended line, plane and spacing
Contact and seating	Mating surfaces, shoulders, collars and rivet heads seat as intended
Section preservation	No unnecessary thinning, gouging or grinding at the joint
Surface integrity	No unacceptable cracks, tears, cold shuts, burns, arc strikes or sharp projections
Weld profile	Fusion weld matches the required profile and acceptance criteria
Craft consistency	Repeated rivet heads, collars and forged details are intentionally consistent
Function	Moving, removable or load-bearing features perform as designed
Finish readiness	Scale, spatter, grease and contamination are controlled for the specified finish
Traceability	Material, consumable, inspection or procedure records are available where required

Visual inspection alone does not prove compliance with a structural or coded welding requirement. Where a drawing, standard or client requires measurement, destructive testing, non-destructive testing, welder qualification or a welding procedure, those requirements take precedence.

Sustainability and Resource Efficiency

Sustainable craft is not only about recycled steel. It includes design life, repairability, process energy, material yield, consumables, extraction energy, finishing systems and the avoidance of rework.

Decision	Lower-impact approach	Quality safeguard
Process choice	Use cold mechanical joining when it fully meets the design and reduces thermal hazards	Do not substitute a weaker or unsuitable joint only to save energy
Stock planning	Nest cuts and reserve useful offcuts by labelled section and grade	Maintain material identification
Forge use	Match forge size and operating time to the work programme	Do not compromise correct heating or ventilation
Grinding	Achieve accurate fit-up so less abrasive removal is needed	Do not leave harmful burrs or unacceptable defects
Consumables	Store electrodes, wire, gases and fluxes correctly to avoid spoilage	Follow manufacturer and procedure requirements
Design for repair	Prefer replaceable components where the product brief allows	Ensure fasteners and joints still meet duty requirements
Finishing	Select durable coating systems appropriate to exposure and maintenance	Prepare surfaces to the coating manufacturer's requirements
Waste	Separate clean ferrous offcuts, non-ferrous metals, spent abrasives and hazardous residues	Follow workplace and legal waste procedures

A repairable gate that remains in service for decades may have a lower life-cycle impact than a lighter but disposable assembly. Sustainability decisions should therefore include expected service life and maintenance, not only the energy used during the joining operation.

Glossary

Term	Meaning in this module
Anvil	Forging support with faces and features used for shaping and tooling
Bolster	Supporting tool or die used beneath a rivet, punch or formed feature
Collar	A strip or ring fitted around intersecting or adjacent elements to hold them together
Consumable	Material used up by the process, such as electrode, wire, filler rod, gas, flux or abrasive
COSHH	UK framework for controlling substances hazardous to health
Drift	Tapered or shaped tool used to size and finish a hot-punched hole
Filler metal	Metal added to a welded or brazed joint
Fit-up	Positioning, alignment and gap condition of parts before final joining
Flashback arrester	Gas-system safety device intended to reduce the risk of flame travelling back toward the supply
Forge welding	Joining suitably prepared hot metal surfaces by pressure or hammering without bulk fusion of the joint
Flux	Process material used to manage oxides or improve wetting in some joining operations
Grip	Combined thickness of material held by a fastener
LEV	Local exhaust ventilation that captures airborne contamination near its source
MAG	Metal active gas welding using a continuously fed wire electrode and active shielding gas
MIG	Metal inert gas welding using a continuously fed wire electrode and inert shielding gas
MMA	Manual metal arc welding using a flux-coated consumable electrode
Mortise	Hole or slot that receives a tenon
Parent metal	Main workpiece material being joined
Rivet	Permanent mechanical fastener whose shank is upset to create or complete a second head
RPE	Respiratory protective equipment selected to control inhalation exposure
Scarf	Prepared tapered or shaped end used to create suitable geometry for a forge weld
Tenon	Reduced projecting end made to pass through a mortise
TIG	Tungsten inert gas welding using a non-consumable tungsten electrode
WPS	Welding procedure specification describing controlled welding variables for a defined application
Wrought iron	Historic iron material containing slag stringers; not a synonym for modern mild steel

Reflection

Reflection prompt	Your evidence
Which joining process in your current workshop produces the most rework, and why?	Record one observed cause and one measurable improvement
Which traditional joint makes the strongest visual contribution to a piece of artistic metalwork?	Use a sketch or photograph with annotations
Where does material identification enter your normal workflow?	Mark the point on a simple process map
Which control protects other people in the workshop as well as the operator?	Give one example from welding or grinding
When would a bolted joint be better craft practice than a forged or welded joint?	Explain in terms of function and maintenance
What would make you stop a joining operation before the first heat or arc?	Name at least three evidence-based stop conditions

Interactive Tasks

Quiz: Test Your Knowledge

Which tool choice is most important when handling hot bar for a joint? (Tongs that grip the stock securely) (!Tongs chosen only by handle length) (!Any general purpose pliers) (!Bare hands inside welding gloves)

What should happen if a steel coating is unknown before hot work? (Stop and identify the coating) (!Heat it until the coating disappears) (!Grind it without extraction) (!Assume it is ordinary paint)

What is the main purpose of local exhaust ventilation during welding? (Capture fume close to its source) (!Cool the weld more quickly) (!Increase the welding current) (!Polish the finished joint)

Which joint is designed around upsetting a fastener shank? (Riveted joint) (!Adhesive joint) (!Threaded insert) (!Brazed seam)

What receives a tenon in traditional forged joinery? (Mortise) (!Electrode) (!Regulator) (!Nozzle)

Which term describes the main workpiece metal being joined? (Parent metal) (!Backing gas) (!Abrasive media) (!Rivet set)

What is the correct status of BS EN ISO 9606 in this module? (A standard used when the job requires it) (!A licence required for every blacksmith) (!A replacement for workplace training) (!An automatic international certificate)

Why is modern mild steel not automatically called wrought iron? (The materials have different structures) (!Mild steel is always stainless) (!Wrought iron is a welding gas) (!Mild steel cannot be forged)

What should you do before forcing misaligned rivet holes together? (Correct the fit and alignment) (!Use a larger hammer) (!Heat the fastener blindly) (!Remove the clamps)

Which evidence best shows a joining process is sustainable? (Long service life with low rework) (!Maximum grinding after welding) (!Discarding all useful offcuts) (!Using more heat than required)

Memory Game

Rivet	Fastener whose shank is upset to form a permanent joint
Scarf	Prepared geometry used at a forge-weld interface
Mortise	Opening that receives a projecting tenon
LEV	Extraction system that captures contamination near the source
Bolster	Supporting tool beneath a rivet or punched feature
Parent metal	Main material being joined
Collar	Wrapped metal element that secures intersecting bars

Drag and Drop

Match the correct terms.	Topic
Matched tongs	Secure control of hot stock
Rivet set	Finishing a specified rivet head
Local exhaust ventilation	Capturing welding fume
Mortise and tenon	Geometric forged interlock
Shielding gas	Protecting a gas shielded welding arc

Crossword Puzzle

Rivet	Which permanent fastener is upset to make a second head?
Mortise	Which opening receives a tenon?
Collar	Which wrapped element can secure crossing bars?
Bolster	Which support tool can sit beneath a rivet during heading?
Electrode	Which component carries welding current into an arc?
Extraction	Which control removes fume close to its source?

LearningApps

Cloze Text

A joining process should be selected to meet the

rather than by habit. Before hot work, the parent material and any surface

must be identified. Tongs should match the workpiece so that the hot stock can be held

. During welding, local exhaust ventilation captures hazardous

near its source. A projecting end that fits into a mortise is called a

. A permanent fastener that is upset to make a second head is a

. A welding procedure specification is commonly abbreviated as

. Final inspection should compare the joint with the drawing and defined

.

Open-Ended Tasks

Easy

Tool identification board: Photograph or sketch ten joining tools in your supervised workshop, label their practitioner names and add one sentence explaining the joint operation each tool supports.
Material identity card: Create a one-page comparison of mild steel, historic wrought iron, stainless steel and one copper alloy, including one safe joining consideration for each.
Joint gallery: Find four examples of rivets, collars, mortise-and-tenon joints or welds in approved local metalwork and annotate what function and visual effect each joint provides.
Stop-work poster: Design an accessible workshop poster showing six conditions that should stop a joining task before heat, arc or powered-tool use begins.

Standard

Blacksmith interview: Interview a working blacksmith, fabricator or vocational instructor about how they select tongs, fasteners, consumables and fume controls, then separate personal preference from formal workplace requirements.
Supervised rivet record: During an instructor-led riveting exercise, document the drawing, tool selection, fit-up checks, communication, inspection result and any defect without performing any unapproved hot-work step.
Extraction observation: Observe an authorised welding bay and create a diagram showing the fume source, LEV inlet, welder position, nearby-person exclusion zone and one possible airflow disturbance.
Sustainable cut plan: Produce a cut list for a small decorative grille that minimises waste while preserving grade identification and sufficient stock allowance for forged joints.

Advanced

Joint selection report: Compare a riveted, collared and welded solution for the same decorative intersection and justify one choice using load path, aesthetics, repairability, fume, energy, production time and inspection.
Quality plan: Draft an inspection and evidence plan for a bespoke gate assembly, distinguishing dimensional checks, craft appearance, weld checks, material traceability and any tests that must be specified by a competent designer.
Process trial design: With instructor approval, design a supervised comparative trial that changes one variable in fit-up or tooling while holding other variables constant, then define measurable quality outcomes before any hot work begins.
Expert review video: Produce a short captioned video for peer and instructor review explaining one joining tool-and-material system, including jurisdiction, risk controls, common errors, sustainability and the limits of your own competence.

Learning Assessment

Process selection assessment: Given a design brief for an exterior artistic gate, justify a joining method for three different intersections and explain how corrosion exposure, aesthetics, maintenance and workshop controls affect the choices.
Hazard-control assessment: Analyse a workshop scenario with welding fume, grinding sparks and unknown coated stock, identify the stop-work conditions and propose a hierarchy of controls using current HSE principles.
Tooling assessment: From a set of joining drawings, specify the holding, supporting, forming and inspection tools required and explain the consequence of one poor tool match at each stage.
Defect diagnosis assessment: Inspect sample photographs or physical practice joints, distinguish fit-up errors from process errors and write a reasoned rework or reject decision against stated acceptance criteria.
Sustainability assessment: Redesign a small metalwork assembly to reduce heat input, abrasive use and scrap while keeping the required function, appearance and service life.
Transfer assessment: Explain how you would adapt the planning process when moving from a decorative workshop object to an installed architectural component without assuming that the same standards, qualifications or inspection level apply.

Evidence of Learning

Knowledge evidence: You can explain the difference between mechanical fastening, forged joinery, forge welding, fusion welding and brazing; distinguish mild steel from historic wrought iron; explain the roles of parent metal, filler, fastener, flux and shielding gas; and describe why HSE, Skills England, BSI requirements and workplace instructions have different functions.

Skill evidence: Under the level of supervision and authorisation set by your workplace, you can select matched holding and forming tools, prepare accurate fit-up, use measuring equipment, maintain material identification, support a controlled joining sequence and carry out visual and dimensional inspection.

Product evidence: Your portfolio contains drawings, tool-selection sheets, material records, supervised practice samples, inspection records, annotated photographs and a short process evaluation.

Safety evidence: You consistently recognise stop-work conditions, protect other people in the work area, use the assessed fume-control system, maintain a hot-stock zone, report defective tools and do not operate beyond your authorisation.

Quality evidence: You compare work with defined acceptance criteria rather than relying on appearance alone, record defects accurately and distinguish a repairable cosmetic issue from a structural or specification non-conformance.

Transfer evidence: You can explain how process choice changes when the design brief changes from decorative craft to conservation, production, repair or installed architectural metalwork, and you do not assume cross-country or cross-sector equivalence.

Official Sources and Expert Review Notes

The following sources were checked for the jurisdictional statements in this module. They should be checked again during expert review because standards, regulator guidance and apprenticeship arrangements can change.

Skills England — Blacksmith ST0378 version 1.1: England occupational standard and apprenticeship status.
HSE — Welding fume: protect your workers: current control expectations for welding-fume risk.
HSE — Controlling the risks from welding: process selection, LEV, RPE, screens and practical control guidance.
HSE — PUWER overview: suitability, maintenance, inspection, information, instruction and training for work equipment.
HSE — Safety in gas welding, cutting and similar processes: oxy-fuel equipment hazards and precautions.
HSE — Manual handling at work: avoiding, assessing and reducing hazardous manual handling.
BSI — ISO 9606 series: welder qualification-testing standards.
BSI — ISO 3834 series: quality requirements for fusion welding.

Expert-review checklist: confirm material terminology; verify that practical sequences match local workshop safe systems; confirm that media remain available and educationally appropriate; check accessibility and captions; verify all current HSE, Skills England and BSI references; and ensure no wording is interpreted as authorisation for unsupervised hazardous work.