Application
This unit of competency defines the skills and knowledge required to identify material properties and select appropriate welding processes that would typically conform to AS 1554 General Purpose and American Bureau of Shipping (ABS) or equivalent, to achieve safe and effective welding outcomes.
This unit applies to all types of welding and includes the identification of properties and characteristics of all commonly used metals, and selection of appropriate welding techniques to ensure integrity of materials is maintained during welding processes.
This unit can only be selected in conjunction with one or more of the following units:
MEM05015 Weld using manual metal arc welding process
MEM05017 Weld using gas metal arc welding process
MEM05019 Weld using gas tungsten arc welding process
MEM05023 Weld using submerged arc welding process
MEM05047 Weld using flux core arc welding process
MEM05055 Weld using oxy fuel gas welding process
No licensing, legislative or certification requirements apply to this unit at the time of publication.
Band: A
Unit Weight: 2
Elements and Performance Criteria
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. | ||
1 | Determine job requirements | 1.1 | Follow standard operating procedures (SOPs) |
1.2 | Comply with work health and safety (WHS) requirements at all times | ||
1.3 | Use appropriate personal protective equipment (PPE) in accordance with SOPs | ||
1.4 | Identify job requirements from specifications, job sheets or work instructions | ||
2 | Identify properties of commonly used metals | 2.1 | Identify materials to be welded |
2.2 | Identify characteristics and properties of commonly used materials | ||
2.3 | Identify uses and purposes of commonly used materials | ||
2.4 | Consider basic metallurgical characteristics | ||
3 | Identify and provide for welding contingencies | 3.1 | Source Information relevant to welding processes, as required |
3.2 | Identify potential contingencies and consider solutions | ||
4 | Identify appropriate welding process | 4.1 | Identify and select welding processes to achieve specified outcomes with selected metals |
4.2 | Identify effects of welding processes on materials | ||
4.3 | Identify distortion prevention measures | ||
4.4 | Identify alternative joining methods for job and assess for relevancy | ||
5 | Identify cleaning and preparation requirements | 5.1 | Identify processes for cleaning and preparing metals |
5.2 | Consider role of contaminants in welding flaws | ||
5.3 | Identify and utilise safety requirements for chemicals and other materials in accordance with manufacturers' specifications and legislative requirements | ||
Foundation Skills
This section describes those required skills (reading, writing, oral communication and numeracy) that are essential to workplace performance in this unit of competency.
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.
Range Statement
This field allows for different 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. | |
Characteristics include the following: | tensile strength, grade, heat resistance and density |
Properties include the following: | physical properties, flammable limits and melting point |
Basic metallurgical characteristics include the following: | alloys and grades of metals and different types of electrodes |
Information includes one (1) or more of the following: | steel suppliers’ handbooks welding company materials SOPs safety documentation |
Welding processes include one (1) or more of the following: | fusion – electric arc welding, gas (oxy-fuel) welding and thermit welding pressure welding processes – resistance welding, fire or forge welding, friction welding and explosive welding low temperature processes – soldering and brazing other – ultrasonic welding and electron beam welding |
Effects include one (1) or more of the following: | thermal expansion heat affected zones fume emissions altered density distortion |
Distortion prevention measures include one (1) or more of the following: | heat treatments consolidations |
Processes for cleaning and weld preparation include one (1) or more of the following: | etching grinding arc gouging thermal cutting chemical additives anti-corrosion treatments |
Safety requirements include one (1) or more of the following: | dry and ventilated areas in accordance with workplace procedures location away from heat risks location away from incompatible substances requirements for hazardous substances adequate signage and labelling appropriate sealing routine inspections emergency procedures regulatory notification requirements |
Competency Field
Fabrication