Australian Steel Grades
Common Australian Steel Grades include grades 250, 300, 350, 400, and 450. These grades correspond approximately to the yield strength of the steel, but do not necessarily match exactly.
Australian Steel Grades are handled in Australian Standards, such as AS/NZS 3679.1 (Structural Steel – Hot Rolled Bars and Sections) and AS/NZS 3678 (Structural Steel – Plates). Hollow Sections can be found in AS/NZS 1163.
Australian Steel Grade Designations
| Steel Grade | Cross Sections | Standard | Thickness Range (mm) | Yield Strength (MPa) | Tensile Strength (MPa) |
|---|---|---|---|---|---|
| 250 | Circular Hollow Sections | AS/NZS 1163 | All | 250 | 320 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤8 | 320 | 430 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤12 | 310 | 430 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤20 | 300 | 430 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤50 | 280 | 430 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤80 | 270 | 430 |
| 300 | Welded Beams and Welded Columns | AS/NZS 3678 | >80 | 260 | 430 |
| 300 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | <11 | 320 | 440 |
| 300 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | ≤17 | 300 | 440 |
| 300 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | >17 | 280 | 440 |
| 350 | Rectangular, Square and Circular Hollow Sections | AS/NZS 1163 | All | 350 | 430 |
| 350 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤12 | 360 | 450 |
| 350 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤20 | 350 | 450 |
| 350 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤80 | 340 | 450 |
| 350 | Welded Beams and Welded Columns | AS/NZS 3678 | >80 | 330 | 450 |
| 350 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | ≤11 | 360 | 480 |
| 350 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | <40 | 340 | 480 |
| 350 | Universal Beams, Universal Columns, Beam Tees, Column Tees, Equal Angles, Unequal Angles and Channels | AS/NZS 3679.1 | ≥40 | 330 | 480 |
| 400 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤12 | 400 | 480 |
| 400 | Welded Beams and Welded Columns | AS/NZS 3678 | ≤20 | 380 | 480 |
| 400 | Welded Beams and Welded Columns | AS/NZS 3678 | >20 | 360 | 480 |
| 450 | Rectangular and Square Hollow Sections | AS/NZS 1163 | All | 450 | 500 |