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Basically ASTM A572 Gr 50 is high strength, low alloy Columbium-Vanadium structural steel. ASTM A36 steel is just a common low carbon steel. Both chemical composition and mechanical properties of ASTM A572 Gr 50 and A36 steel differ much with each other.
ASTM A572 Gr 50 VS A36 steel in chemical composition:
| Item | C | Mn | P | S | Si | Cu |
| A572 Gr 50 | ≦0.26 | ≦1.65 | ≦0.040 | ≦0.050 | ≦0.40 | - |
| A36 | ≦0.26 | - | ≦0.040 | ≦0.050 | ≦0.40 | ≧0.20 |
ASTM A572 Gr 50 VS A36 steel 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 |
| A572 Gr 50 | 345 | 450 | 18 |
| A36 | 250 | 400-550 | 23 |
ASTM A572 Gr 50 steel plate is used in a variety of structural applications including bridges, buildings, construction equipment, freight cars, machinery, truck parts and transmission towers.
ASTM A36 steel is used in bolted, riveted and welded processes. Depending on your applications, different steel grades of the two may be used.
