steel wire,chain pin material 1. for chain(04C-24A) 2. material:20CrMnMo ... 45≤0.0251.45-1.65 Our factory produce chain pin material 20CrMnMo, the diameter is1.8mm-15mm or custom- ... chain material and chain components,such as ribbonfil,chain pin material,chain pin,chain bush,chain plate and so on;4.We ... you the update quotation accordingly., 20CrMnMo steel wire,chain pin material for chain(04C-24A)