... time 3.ISO Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, 20CrMnTi, 42CrMo, ... box or customer requirement.Industry Roller Chain Sprocket-Simplex Type B Product range from simplex,duplex,triplex quadruplex, ... Workpiece is heated by induction hardening and then quenching.8.Main export market s are US, europe , south east asia ...