This unit of competency has been developed for Engineering Tradesperson - Fabrication apprenticeship training and the recognition of trade-level skills in gas tungsten arc welding (GTAW) on heavy or light metal fabrications. It may also apply to other trade occupations requiring higher level GTAW welding skills.

Weld quality would typically conform to AS 1554 General Purpose and American Bureau of Shipping (ABS), or equivalent.

Where manual thermal processes associated with preparation, pre-heat and/or post-heat is required unit MEM05007 Perform manual heating and thermal cutting and unit MEM05008 Perform advanced manual thermal cutting, gouging and shaping, should also be selected as appropriate.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

Unit details

Study level:
Vocational and further education (TAFE)
Unit code:


MEM05049 - Perform routine gas tungsten arc welding

MEM05051 - Select welding processes

MEM05052 - Apply safe welding practices

MEM09002 - Interpret technical drawing

MEM11011 - Undertake manual handling

MEM12023 - Perform engineering measurements

MEM12024 - Perform computations

MEM13015 - Work safely and effectively in manufacturing and engineering

MEM14006 - Plan work activities

MEM16006 - Organise and communicate information

MEM18001 - Use hand tools

MEM18002 - Use power tools/hand held operations


Assessment tasks will be designed to reinforce and extend knowledge and skill competence within set and controlled parameters in accordance with each unit's learning outcomes and performance criteria requirements, including the setting of work based practical application tasks designed to provide evidence of competence outcomes, within periodic and scheduled timelines. Students will be expected to demonstrate the following required skills: - following work instructions, standard operating procedures and safe work practices; - identifying and interpreting specifications from drawings, sketches and verbal or written job instructions for welding using gas tungsten arc welding process (GTAW) to the specified standard; - selecting appropriate weld and joint preparation methods; - consistently weld materials to the specified standard using AC or DC welding machines and electrodes while preventing distortion; - rectifying any defects, and; - completing weld records related to GTAW onto standard workplace forms.Students will also be expected to demonstrate the following knowledge: - safe welding practices and procedures and use of personal protective equipment (PPE); - correct welding machine, leads, hand pieces and electrodes; - material preparation; - joint preparations; - electrode classification; - causes of distortion for materials when welded; - causes of defects and methods of rectification; - relationships between amperage, electrode and material; - types of gases and their uses; - types of electrodes, current settings and high frequency voltage; - filler materials and consumables, and; - standards for GTAW welding, AS 1554 General Purpose and other equivalent standards.

Where to next?

As part of a course

This unit is studied as part of the following courses. Refer to the course page for information on how to apply for the course.

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