AS/NZS 1554.4:2004 PDF Download

AS/NZS 1554.4:2004 is a standard that specifies the requirements for welding high strength quenched and tempered steels used in steel structures. The standard covers a range of welding processes including manual metal-arc welding, submerged arc welding, gas metal-arc welding, gas tungsten-arc welding, flux-cored arc welding, electroslag welding, and electrogas welding. However, it notes that these processes may not be suitable for all cases of welding quenched and tempered steels and refers to further technical notes for additional guidance.

The standard applies to the welding of quenched and tempered steel parent materials in structures that comply with appropriate standards. It distinguishes between welded joints that are subject to fatigue conditions and those that are not. For joints subject to fatigue conditions, the standard specifies permissible stress ranges based on the fatigue provisions of AS 3990 and other application standards. The stress range in the welded joint must comply with these permissible stress ranges or lower weld categories in AS 4100 or NZS 3404.1. Weld joints that exceed these stress ranges are classified into categories based on their stress range and require different levels of weld quality assurance.

In addition to steel structures, the standard also applies to the welding of bridges, cranes, hoists, earthmoving equipment, and other dynamically loaded structures, as well as steelwork in non-structural applications. The standard emphasizes the need for qualified weld preparations, welding consumables, and welding procedures before the commencement of welding. It also provides prequalified joint preparations, welding consumables, and welding procedures.