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Both A36 steel and A572 grade 50 HSLA plate are iron alloys. Both are them are furnished in the as-fabricated (no temper or treatment) condition. But they have different strength level, and they also have a lot differences in chemical composition. Below is for A36 steel VS A572 grade 50 HSLA plate.
A36 steel VS A572 grade 50 HSLA plate in chemical composition:
| Item | C | Mn | P | S | Si | Cu |
| A36 | ≦0.26 | - | ≦0.040 | ≦0.050 | ≦0.40 | ≧0.20 |
| A572 grade 50 | ≦0.26 | ≦1.65 | ≦0.040 | ≦0.050 | ≦0.40 | - |
A36 steel VS A572 grade 50 HSLA plate in mechanical properties:
| Item | Yield strength ReH/(N/mm2) (t≤16mm) min |
Tensile strength Rm/(N/mm2) (3mm≤t≤16mm) |
Elongation A/% (3mm≤t≤40mm) min |
| A36 | 250 | 400-550 | 23 |
| A572 grade 50 | 345 | 450 | 18 |
A572 grade 50 HSLA plate is widely used in engineering structures, construction machinery, mining machinery, heavy-duty trucks, bridges, etc. A36 steel is mainly for applications where high strength is not strictly required.
