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| STANDARD | GRADE | EQUIVALENT | UTS N/mm2 | PROPERTIES |
|---|---|---|---|---|
BS3100: 1991 | A1 | ASTM A27 Gr. 60-30 | 430 | Structural, weldable mild steel. |
| A2 | ASTM A27 Gr. 70-36 | 490 | Structural, weldable mild steel. | |
| A3 | ASTM A148 Gr. 80-40 | 540 | Structural medium tensile steel. | |
| AW1 | - | - | For blank carburising. | |
| AW2 | - | 620 | Good wear resistance and suitable for surface hardening. | |
| AW3 | - | 690 | ||
| A4 | ASTM A148 Gr. 80-50 | 540 - 690 | 1.5% Mn steel medium strength, good weldability. | |
| A5 | ASTM A148 Gr. 90-60 | 620 - 770 | 1.5%Mn steel up to 4' section | |
| A6 | ASTM A148 Gr. 105-85 | 690 - 850 | 1.5% Mn steel, higher tensile than above up to 2.5' section. | |
| ASTM A216 | WCA | UNS J02502 | 415 - 585 | Carbon Steels for pressure-containing parts. |
| WCB | UNS J03002 | 485 - 655 | ||
| WCC | UNS J02503 | 485 - 655 |