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| C(%) | Si(%) | Mn(%) | P(%) | S(%) | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 | 0.38-0.43 |
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Carbon Steels and Manganese Steels for Machine Structural use
| Steel Type | Standard | Country Code | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | ≦0.03 | ≦0.25 | SMn438 | 4445 | CNS | 0.35-0.41 | 0.15-0.35 | 1.35-1.65 | ≦0.03 | ≦0.03 | ≦0.25 | 40Mn2 | 3077 | GB | 0.37-0.44 | 0.17-0.37 | 1.4-1.8 | ≦0.035 | ≦0.03 | ≦0.25 | SMn438 | G4106 | JIS | 0.32-0.41 | 0.15-0.35 | 1.35-1.65 | ≦0.03 | ≦0.03 | ≦0.25 | 1340 | - | AISI | 0.38-0.43 | 0.15-0.35 | 1.6-1.9 | ≦0.035 | ≦0.03 | ≦0.25 |
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| 50Mn | C40 | 40Mn4 | 30Mn | S40C | S58C | 20Mn2 | Ck30 | 1033 | 60Mn | Ck60 | SMn443H | SMn420 | 1340 | SMn420H | 20Mn5 | S58C | 30 | 1561 | 1561 |
| MB7 | Class 2 | SMA490CP | B4 | SMnC420 | CuSn12 | 1340 | 5052 | YBSC1 | QT800-2 |