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C | Si | Mn | P | S | B | ALt |
0.25-0.32 | 0.45-0.8 | 1.3-1.5 | 0.02 | 0.008 | 0.001-0.003 | 0.02-0.05 |
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Rel 490MPa | Rm 680MPa | 19% |
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