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| C(%) | V(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Mo(%) | Ni(%) | Yield stress (Mpa) | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 | ≦0.25 |
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Quenched and Tempered Alloy Steel Forgings for Pressure Vessels
| Steel Type | Country Code | C(%) | V(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Mo(%) | ≦0.02 | 1.5-2.0 | 0.4-0.6 | SFVQ3 | CNS | ≦0.23 | ≦0.03 | ≦0.4 | 0.2-0.4 | ≦0.02 | ≦0.02 | 1.5-2.0 | 0.4-0.6 | SFVQ3 | JIS | ≦0.25 | ≦0.03 | ≦0.4 | 0.2-0.4 | ≦0.02 | ≦0.02 | 1.5-2.0 | 0.4-0.6 | Class 3A | ASTM | ≦0.25 | ≦0.05 | 0.15-0.35 | 1.2-1.5 | ≦0.025 | ≦0.02 | 1.5-2.0 | 0.4-0.6 | SFVQ1B | CNS | ≦0.25 | ≦0.05 | ≦0.4 | 1.2-1.5 | ≦0.03 | ≦0.02 | 1.5-2.0 | 0.4-0.6 | SFVQ1B | JIS | ≦0.25 | ≦0.05 | ≦0.4 | 1.2-1.5 | ≦0.03 | ≦0.02 | 1.5-2.0 | 0.4-0.6 |
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| SFVQ1A | Class 3A | SFVQ3 | Class 2A | SFVQ2B | SFVQ2B | SFVQ2A | SFVQ1A | SFVQ1B | Class 3 | SFVQ2A | SFVQ3 | SFVQ1B | SFVQ1B |
| 1016 | SEV295 | AC40A | TP270/TR270 | 37Cr4 | FCMWP-440 | TP340/TR340 | PBC2 | 40CrMn-Mo7 | C4640P |