Technical Standards

The library distinguishes product standards (what the steel is), design standards (how members are designed) and fabrication standards (how steelwork is made and erected).

Product standards

AU AS/NZS 3679.1:2016 Product

Structural steel – Part 1: Hot-rolled bars and sections

Chemical composition, mechanical properties and tolerances for hot-rolled structural steel bars and sections (UB, UC, PFC, angles, flats, rounds).

Applies to: UB UC PFC EA UA T FB RB

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

AU AS/NZS 3679.2:2016 Product

Structural steel – Part 2: Welded I sections

Requirements for welded I sections (WB, WC) produced from plate.

Applies to: WB WC

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

AU AS/NZS 1163:2016 Product

Cold-formed structural steel hollow sections

Cold-formed, electric resistance welded circular, square and rectangular hollow sections and their grades (C250L0, C350L0, C450L0).

Applies to: CHS RHS SHS

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

AU AS/NZS 3678:2016 Product

Structural steel – Hot-rolled plates, floorplates and slabs

Hot-rolled structural steel plates, floorplates and slabs, grades 250, 300, 350, 400 and others.

Applies to: PL BUC

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

Design standards

AU AS 4100:2020 Design

Steel structures

Limit state design of steel structural members and connections (hot-rolled, welded and hollow sections).

Applies to: UB UC PFC EA UA CHS RHS SHS T WB WC FB RB PL BUC

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

AU AS/NZS 4600:2018 Design

Cold-formed steel structures

Design of cold-formed steel structural members such as C and Z purlins and lipped channels.

Applies to: C Z LC

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

Fabrication standards

AU AS/NZS 5131:2016 Fabrication

Structural steelwork – Fabrication and erection

Fabrication, erection, inspection and documentation of structural steelwork, using Construction Categories CC1 to CC4.

Applies to: UB UC PFC EA UA CHS RHS SHS T WB WC FB RB PL BUC

Standards Australia / Standards New Zealand · Unverified confirm current edition and amendments

Steel grades

GradeStandardProduct form Thickness range → fy / fu (MPa)Data
AU C250L0AS/NZS 1163:2016Cold-formed hollow sections 0–50 mm: 250 / 320 U
AU C350L0AS/NZS 1163:2016Cold-formed hollow sections 0–50 mm: 350 / 430 U
AU C450L0AS/NZS 1163:2016Cold-formed hollow sections 0–50 mm: 450 / 500 U
AU 250AS/NZS 3678:2016Hot-rolled plate 0–8 mm: 280 / 410 8–12 mm: 260 / 410 12–50 mm: 250 / 410 50–80 mm: 240 / 410 80–150 mm: 230 / 400 U
AU 300AS/NZS 3678:2016Hot-rolled plate 0–8 mm: 320 / 430 8–12 mm: 310 / 430 12–20 mm: 300 / 430 20–50 mm: 280 / 430 50–80 mm: 270 / 430 80–150 mm: 260 / 430 U
AU 350AS/NZS 3678:2016Hot-rolled plate 0–12 mm: 360 / 450 12–20 mm: 350 / 450 20–80 mm: 340 / 450 80–150 mm: 330 / 450 U
AU 300AS/NZS 3679.1:2016Hot-rolled sections and bars 0–11 mm: 320 / 440 11–17 mm: 300 / 440 17–200 mm: 280 / 440 U
AU 350AS/NZS 3679.1:2016Hot-rolled sections and bars 0–11 mm: 360 / 480 11–40 mm: 340 / 480 40–200 mm: 330 / 480 U
AU 300AS/NZS 3679.2:2016Welded I sections 0–8 mm: 320 / 430 8–12 mm: 310 / 430 12–20 mm: 300 / 430 20–50 mm: 280 / 430 50–80 mm: 270 / 430 U

Grade strengths are entered for reference and marked UNVERIFIED until checked against the current edition. Always use the mill certificate and the current standard for design.