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Alloy Construction Steel DIN 1.7225 4140 Scm440 42CrMo4 Q + T Heat Treatment Grade: Alloy Steel 4140 DIN 42CrMo41.7225SCM440 Chemical composition (%): Grade C Si Mn P≤ S≤ Cr Mo Ni≤ Cu≤ SAE 4140 0.38-0...