... yearInspection Chemical Composition Analysis, Tensile Test, Dimension Inspection, Hardness TestingSurface TreatmentHeat Treatment, Machine, Polishing, Chrome, Zinc, Nickel PlatingPackingCartons, Wooden Case, Steel Cases ... , forging and machining,with the material of carbon steel, stainless steel,alloy steel,iron,ductile. All sorts of our prodcuts are used on construction machinery ...