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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(%) | ≦0.03 | ≦0.25 | 0.45-0.60 | SFVQ1A | CNS | ≦0.25 | ≦0.05 | ≦0.4 | 1.2-1.5 | ≦0.03 | ≦0.03 | ≦0.25 | 0.45-0.60 | SFVQ1A | JIS | ≦0.25 | ≦0.05 | ≦0.4 | 1.2-1.5 | ≦0.03 | ≦0.03 | ≦0.25 | 0.45-0.60 | Class 3 | ASTM | ≦0.25 | ≦0.05 | 0.15-0.35 | 1.2-1.5 | ≦0.035 | ≦0.03 | ≦0.25 | 0.45-0.60 |
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| SFVQ1A | Class 3A | SFVQ3 | Class 2A | SFVQ2B | SFVQ2B | SFVQ2A | SFVQ1A | SFVQ1B | Class 3 | SFVQ2A | SFVQ3 | SFVQ1B | SFVQ1B |
| KTB380-12 | A380.0(SC84A) | SC450 | 1572 | A2117W | SM400B | C5111W | A1050TW | SPV315 | SCMn2A |