... Steel 2.Material:carbon steel 3.with heat treatment 4.OEM are welcomed casting bulldozer parts with carbon steel Quality System CertificateISO 9001Dimension ... Composition Analysis, Tensile Test, Dimension Inspection, Hardness TestingSurface TreatmentHeat Treatment, Machine, Polishing, Chrome, Zinc, Nickel PlatingPackingCartons, Wooden Case, Steel Cases, PalletsAdvantage1 ...