... dimensional accuracy, decreasing the surface roughness, minimizing cut amount of finish, meanwhile,Improving product grades.2) Producing thin wall thickness, ... A351(U.S.),DIN(Germany),JIS(Janpan).Materials supplied: Stainless steel, Carbon steel, Low alloy steel, Aluminium alloy, Copper alloy,etc. Machined Castings weight ... Surface Roughness: Ra3.2~Ra12.5samll order can accept stainless steel casting