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| BRITISH STANDARD | GRADES | U.S.A. | Hardness BHN | UTS (N/mm2) | PROPERTIES |
|---|---|---|---|---|---|
BS3100: 1991 | BT1 | ASTM A148 Grades 105-85 | 201-279 | 690 | NI/CR/MO STEELS GOOD COMBINATION OF STRENGTH TOUGHNESS & FATIGUE RESISTANCE |
BT2 | ASTM A148 Grades 120-95 | 248-327 | 850 | ||
BT3 | ASTM A148 Grades 150-125 | 293-362 | 1000 | ||
B1,B2,B3,B4 | ASTM A217 Grades WC1,WC6,WC9 | - | 460-540 | CR/MO STEELS FOR USE AT ELEVATED TEMPERATURES, SOME CORROSION AND CREEP RESISTANCE | |
B5,B6 | ASTM A217 Grade C5,C12 | - | 620 | ||
| BW2 | - | 201-255 | - | CHROME STEELS- ABRASIVE RESISTANT FOR WEAR TILES, HAMMERS, STRIKER PLATES etc | |
| BW3 | - | 293 min | - | ||
| BW4 | - | 341 min | - |