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According to the chemical composition and mechanical properties comparison, ASTM A572 gr 50 equivalent JIS steel grade is SS490. SS490 steel is carbon steel in the Japanese standard JIS G3101. ASTM A572 gr 50 equivalent JIS steel grade SS490 only has limitations for P and S contents in chemical composition, while ASTM A572 gr 50 steel has more specific requirements. Below is a brief comparison between A572 gr 50 steel and SS490 steel.
ASTM A572 gr 50 equivalent JIS steel grade SS490 chemical composition:
| Grade | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | N | Mo | B | Als |
| A572 gr 50 | 0.23 | 0.40 | 1.35 | 0.030 | 0.030 | ||||||||||
| SS490 | - | - | - | 0.050 | 0.050 | - | - | - | - | - | - | - | - | - | - |
ASTM A572 gr 50 equivalent JIS steel grade SS490 mechanical properties:
| Grade | Yield Strength (t≤16mm) | Tensile Strength |
| A572 gr 50 | ≥ 345 MPa | ≥ 450 MPa |
| SS490 | ≥ 285 MPa | 490-610 MPa |
ASTM A572 gr 50 equivalent JIS steel grade SS490 is mainly used in the construction of factories for the production of steel frame house, high-voltage transmission towers, bridges, vehicles, etc. ASTM A572 gr 50 equivalent JIS steel grade SS490 can also be used as mechanical parts without high performance requirements.
