G450 steel is a structural steel grade according to the Australian AS 1397 standard. Its minimum yield strength is 450 MPa and the carbon content is 0.2, which is a low-carbon steel. When using steel in the construction field, pay attention to the yield strength. The steel will deform when it is higher than 450 MPa.
G450 steel can be applied to Z, ZF, ZA, ZM, AZ, AM hot dip metallic coatings.
G450 Requirements for Chemical Composition
| Steel grade designation AS 1397 | Chemical composition (cast analysis), % max. | |||
|---|---|---|---|---|
| Carbon | Manganese | Phosphorus | Sulfur | |
| G450 | 0.2 | 1.2 | 0.04 | 0.03 |
G450 Mechanical property requirements
| Steel grade designation | Longitudinal tensile test | Transverse bend test | ||||
|---|---|---|---|---|---|---|
| Min. yield strength MPa | min. tensile strength MPa | Min.elongation,% | Angle of bend degrees | Diameter of mandrel in terms of test piece thickness (t) | ||
| Lo = 50 mm | Lo = 80 mm | |||||
| G450 | 450 | 480 | 10 | 9 | 90 | 4t |
G450 Coating Adhesion (180° bend test) requirements
| Steel grade designation | Diameter of mandrel in terms of thickness of product (t) | |||||||
|---|---|---|---|---|---|---|---|---|
| Coating class | ||||||||
| "Z", "ZA", "ZF" and "ZM" | "AZ" and "AM" | |||||||
| Z100, ZA90 ZF80 ZF100 | Z200, ZA135, ZA180, ZM90, ZM120, ZM150, ZM180 | Z275, ZA225, ZA275, ZM220, ZM275 | Z350, ZA350, ZM350 | Z450, ZA450, ZM450 | Z600 | AZ150, AM100, AM125, AM150 | AZ200, AM175, AM200 AM225 |
|
| G450 | 0 | t | 2t | 2t | 2t | 3t | 2t | 2t |
