... , Carbon steel, Low alloy steel, Aluminium alloy, Copper alloy, stainless precision castingOur investment casting process:1) Enhancing casting parts dimensional ... ),ASTM-A351(U.S.),DIN(Germany),JIS(Janpan).Materials supplied: Stainless steel, Carbon steel, Low alloy steel, Aluminium alloy, Copper alloy ... /2°.Castings Surface Roughness: Ra3.2~Ra12.5Small orders accepted stainless precisoon casting