... treatment: annealing, normalizing, carbonitriding,carburizing, tempering6) Precision shot peen gear faces and roots to increase load capacity IntroductionWe can manufacture ... , ductile iron specifiedStandardASTM , AISI , BS , DIN , JIS , NFProcessInvestment casting , die casting , gravity casting , sand castingMachiningTurning , milling , drilling , grinding , threading , CNC machining, etc. ...