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§÷½è | C | Si | Mn | P | S | Cr | Ni | Cu |
50Mn | 0.48-0.56 | 0.17-0.37 | 0.7-1 | 0.035 | 0.035 | 0.25 | 0.3 | 0.25 |
50Mn2 | 0.47-0.55 | 0.17-0.37 | 1.4-1.8 | 0.025 | 0.025 | 0.3 | 0.3 | 0.25 |
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50Mn | 390Mpa | 645Mpa | 13% | 40% | 31J |
50Mn2 | 785Mpa | 930Mpa | 9% | 40% | 39J |
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