... annealing, normalizing, carbonitriding,carburizing, tempering6) Precision shot peen gear faces and roots to increase load capacity IntroductionWe can manufacture ... , alloy steel , stainless steel , aluminum alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron specifiedStandardASTM , AISI ... , tensile testing, impact testing.CertificateISO9001:2000 / TS16949 High quality gear