Ductile iron valve body: 1.ISO,BS,DIN,JIS,AISI etc. 2.Fine surface finish & tight tolerances 3.NDT inspection Ductile iron valve body specification:Material: cast iron, grey or ductile iron, carbon steel,stainless steel, stainless iron,and as per clients' requriementsCasting steel similar grade refrence chart GBASTMUNSDINW-Nr.JISBSZG200-400-J01700GS-38GS-CK161.04161.1142SC360AW1,CLA9ZG230- ...