Grey iron casting valve parts 1)abundant experience in casting production 2)high-standard technician ... do any metal or alloy parts,such as stainless steel,carbon steel,ductile iron,melleable iron,aluminum,brass,bronze etc.2.Standard ... iron,ductile iron,malleable iron,stainless steel, carbon steel,aluminium,brass etc.standardDIN, ASTM, BS, JIS etc.processsand casting,resin bonded ...