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| C(%) | V(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Mo(%) | Ni(%) | Yield stress (Mpa) | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 | ≦0.27 |
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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(%) | ≦0.03 | 0.25-0.45 | 0.55-0.70 | SFVQ2A | CNS | -0.27 | ≦0.05 | ≦0.4 | 0.5-1.0 | ≦0.03 | ≦0.03 | 0.25-0.45 | 0.55-0.70 | SFVQ2A | JIS | ≦0.27 | ≦0.05 | ≦0.4 | 0.5-1.0 | ≦0.03 | ≦0.03 | 0.25-0.45 | 0.55-0.70 | Class 2A | ASTM | ≦0.27 | ≦0.05 | 0.15-0.35 | 0.5-1.0 | ≦0.035 | ≦0.03 | 0.25-0.45 | 0.55-0.70 |
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| SFVQ1A | Class 3A | SFVQ3 | Class 2A | SFVQ2B | SFVQ2B | SFVQ2A | SFVQ1A | SFVQ1B | Class 3 | SFVQ2A | SFVQ3 | SFVQ1B | SFVQ1B |
| G-CuPb20Sn | SPA-H | W18Cr4V | SF50A | 440B | TP270Pd/TR270Pd | Class 2 | SCS6 | 30CrNi3 | C17200 |