... .Material: Stainless steel-AISI316 AISI304 ,alloy casting and carbon steel,aluminum2.Technics : Precision Cast sand casting, die ... casting, investment casting, precision casting 3.Surface :Mirror or Satin polished, Galvanized and .Xinao Marine,an ... materials involve carbon steel,stainless steel and alloy steel,aluminumCastings conditions: heat treated,machined,electropolished and mirror polished. ...