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Elements and Performance Criteria

1. Plan and prepare to weld component
   • Job requirements are determined from workplace instructions
   • Welding electrodes, weld size, type and sequence, and quantity of materials are identified
   • Hazards associated with the work are identified and risks are managed
   • Tools and equipment are selected and checked for serviceability
   • Work is planned to minimise waste and use time efficiently
2. Weld materials using MMAW
   • Welding equipment is set up and used according to workplace procedures and safety and environmental requirements
   • Distortion prevention measures are identified and adjusted as required
   • Test runs are conducted according to workplace instructions and quality requirements
   • Materials are welded using MMAW process to required specifications
3. Check welds
   • Weld quality and specifications are confirmed by non-destructive inspection
   • Weld defects are identified, prepared for re-welding as required, and appropriate personnel are notified
4. Complete work processes
   • Final inspection is made to ensure work meets workplace expectations and component is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected and stored
   • Tools and equipment are checked, reported if faulty, and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
5. Plan and prepare to weld component
   • Job requirements are determined from workplace instructions
   • Welding electrodes, weld size, type and sequence, and quantity of materials are identified
   • Hazards associated with the work are identified and risks are managed
   • Tools and equipment are selected and checked for serviceability
   • Work is planned to minimise waste and use time efficiently
6. Weld materials using MMAW
   • Welding equipment is set up and used according to workplace procedures and safety and environmental requirements
   • Distortion prevention measures are identified and adjusted as required
   • Test runs are conducted according to workplace instructions and quality requirements
   • Materials are welded using MMAW process to required specifications
7. Check welds
   • Weld quality and specifications are confirmed by non-destructive inspection
   • Weld defects are identified, prepared for re-welding as required, and appropriate personnel are notified
8. Complete work processes
   • Final inspection is made to ensure work meets workplace expectations and component is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected and stored
   • Tools and equipment are checked, reported if faulty, and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Tools and equipment must include:

PPE MMAW equipment MMAW electrodes and materials protective screens and fume extraction system.

Safety and environmental requirements must include:

work health and safety (WHS), and occupational health and safety (OHS) requirements, including procedures for: selecting and using PPE when working with MMAW equipment, including approved welding helmet using specialist welding tools and equipment using protective screens and fume extraction system manually handling components and MMAW equipment identifying and controlling hazards environmental requirements, including procedures for trapping, storing and disposing of waste materials.

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Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standard defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

carry out manual metal arc welding (MMAW), including:

three bead runs, 150 mm long

three pad welds, 150 mm long

three butt welds, 150 mm long

three lap welds, 150 mm long.

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Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS), and occupational health and safety (OHS) requirements relating to carrying out manual metal arc welding on components, including procedures for:

selecting and using personal protective equipment (PPE) when working with MMAW equipment, including approved welding helmet

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling components and MMAW equipment

identifying and controlling hazards

environmental requirements, including procedures for trapping, storing and disposing of waste materials

hazards associated with MMAW, including:

arc eye and exposure to ultraviolet light

metal vapours, welding electrodes and welded components

molten metal spatter and fire danger

distortion control techniques, including:

bracing

pre-setting

tacking

bolting

clamping

jigs and fixtures

material preparation techniques, including characteristics of different metal types

procedures for setting up and operating MMAW equipment

methods and techniques for MMAW, including:

weld specifications

basic welding symbols

types of welding electrodes and their application

protection of vehicle electronics

weld inspection

identification and rectification of weld defects

procedures for final inspection and testing of welded components.

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