... . ISO9001 4."Excellent Supplier of Sulzer" : High manganese steel castings:MaterialHigh manganese steel castingsProcessInvestment casting,sanding castingCertificateISO9001:2008StandardASTM or as your requirementSpecification drawings ... process polishing, sand blasting, t6-heat treatment, painting, powder coating, anodizing, electroplating, mirror polishing.Testing ability spectrograph,heat treatment ...