Forged and casting valve body: 1.100% Traceability 2.ISO,BS,DIN,JIS,AISI etc. 3.Fine ... surface finish & tight tolerances 4.NDT High quality forged and casting ... ductile iron, carbon steel,alloy steel, stainless steel, stainless iron,and as per clients' requriementsCasting steel similar grade refrence chart GBASTMUNSDINW ...