... parts, shipbuilding and railway with parts, each kind of large-scale machinery with parts, flange, various kinds of hardware devices, ... ASTM\AISI\BS\DIN\JISMaterialcasting steel,carbon steel,alloy steel,stainless steel,grey steel etc.ProcessAdvanced sodium silicate casted technology, ... grind arenaceous casting technology, etc.Trademark Website http://jgqcasting.com/ stainless steel pipe fittings