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Elements and Performance Criteria

1. Prepare to carry out basic GMAW welding
   • Job requirements are determined from workplace instructions
   • PPE is chosen and prepared according to workplace procedures and safety and environmental requirements
   • Component and materials to be welded are cleaned and prepared according to workplace and safety requirements
   • Hazards associated with the work are identified and risks are managed
   • Welding tools and equipment are selected and checked for serviceability
   • Work is planned to minimise waste and use time efficiently
2. Weld component using GMAW
   • Welding equipment is set up according to workplace procedures
   • Welding is carried out using appropriate techniques according to workplace procedures and safety and environmental requirements, and without causing damage to components, systems or equipment
   • Welded component is checked to ensure conformity with job requirements
3. 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
4. Prepare to carry out basic GMAW welding
   • Job requirements are determined from workplace instructions
   • PPE is chosen and prepared according to workplace procedures and safety and environmental requirements
   • Component and materials to be welded are cleaned and prepared according to workplace and safety requirements
   • Hazards associated with the work are identified and risks are managed
   • Welding tools and equipment are selected and checked for serviceability
   • Work is planned to minimise waste and use time efficiently
5. Weld component using GMAW
   • Welding equipment is set up according to workplace procedures
   • Welding is carried out using appropriate techniques according to workplace procedures and safety and environmental requirements, and without causing damage to components, systems or equipment
   • Welded component is checked to ensure conformity with job requirements
6. 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.

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 GMAW equipment, including approved welding helmet using specialist welding tools and equipment using protective screens and fume extraction system manually handling components and GMAW 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 standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

carry out gas metal arc welding (GMAW) on the following steel sections:

three butt welds, 150 mm long

three fillet welds, 150 mm long

three steel exhaust pipe butt welds.

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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 basic GMAW, including procedures for:

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

using specialist welding tools and equipment

using protective screens and fume extraction system

manually handling components and GMAW equipment

identifying and controlling hazards

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

hazards associated with GMAW, including:

arc eye and exposure to ultraviolet light

molten metal spatter and fire danger

GMAW principles, including:

process of using an electric arc to melt and join metal

basic construction and operation of welding gun and wire feed unit

types and application of welding wire and shielding gases

properties and characteristics of metals to be welded

types of welds, including:

butt welds

fillet welds

tee joints

corner joints

procedures for protecting vehicle electronics during welding

GMAW procedures, including:

component cleaning and preparation

welder current and voltage settings, gas flow rates, wire diameters and wire feed speed

wire stick out distance, gun angle between the work pieces and travel angle

weld testing procedures, including non-destructive testing

post-weld inspection procedures including, weld defects.

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