1.chain pin (04C-24A) 2.material:20CrMnMo ,40CrNiMo ,20CrNiMo ,GCr15,35CrMo,50CrVA,30CrMnTi,38CrMoAl,40Cr 3. ... .80mm-15.0mm(di 1.chain pin(04C-24A) 2.material:20CrMnMo ,40CrNiMo ,20CrNiMo ,GCr15,35CrMo,50CrVA,30CrMnTi,38CrMoAl,40Cr 3 ... equipment along with professionally trained and skilled labor, a perfect testing system, strong technical capabilities and strict quality controls. We form a ...