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Hot Forging Sae1045 aisi4140 Scm440 42crmo4 Forging Steel Shafts Product Specifications 1. Material: 18CrNiMo7-6, SAE 4340, 4140, S355JR steel shaft roller 34Cr2Ni2MoA/34CrNI3MoA 2. Certificates: ...