... Standard:JIS,DIN,ASTM,BS OEM service available cast steel gate valveWe are a foundry which is near the Qingdao harbor ... 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron,ductile cast iron and so on 4.Process ... ,machining center,plating,HeatTreatment,ect. description materialstainless steel, cast iron, pig iron, carbon steel, alloy steel, non-ferrous, grey ...