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1.2083 420 S136 4Cr13 Special Stainless Plastic Mould Steel Bar Chemical composition (%) Grade delivery hardnessºC C Si P S Cr Ni Mo Mn 420 HRC32-36 0.4 0.8 ≤0.03 ≤0.03 13.5 ~ 0.6 0.5 4Cr13 HB≤201 0...