Chain driven pin shaft steel wire mainly works with driven chain. It is made of  excellent alloy steel, which normally are 20CrMnMo、30CrMnTi、40Cr、35CrMo、40CrNiMo etc.. Raw material steel wire is drawn by wire drawing machine to get bright steel wire, then after vacuum Spheroidizing annealing,to get finished wire.  it is with high tensile strength, good abrasive resistance, smooth surface.