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SAE 1045 AISI 1045 Ck45 20mnv6 42CrMo4 SAE 4140 AISI 4140 Carbon Steel or Alloy Steel Hard Chrome Plated Piston Rods for Hydraulic Cylinder, Find Details and Price about Piston Rod Hard Chrome Plated Rod from SAE 1045 AISI 1045 Ck45 20mnv6 42CrMo4 SAE 4140 AISI 4140 Carbon Steel or Alloy Steel Hard Chrome Plated Piston Rods for Hydraulic Cylinder - Changzhou Chengxin Metal Products Co., Ltd.