... ,20CrMnMo,20CrMo chain pin material for chain , the diameter is4.0mm-8.0mm or custom-tailored ... chain material and components produce experience,it is the largest production base in chain material producing and ... , have more than 180 highly skilled employees, the annual production capacity has exceeded 40,000 tons ... so that I can give you the update quotation accordingly., 4.0-8.0 30CrMnTi,20CrMnMo,20CrMo ...