... stainless steel,carbon steel,aluminum, brass,etc.4.working process:sand casting,investment casting, die casting, forging,stamping, ... etc.5.rich export experience6.certified lab----100% inspection CARBON STEEL PIPE FITTINGSCompany introductionDalian ... . Casting Material: Grey iron, Ductile iron, Alloy steel , Carbon Steel, Aluminum, Brass,etc2. Standard: ISO 9001:20083. ...