Big Forgings Material:Stainless steel ANSI ASTM 304,S30400 304L,S30403,316,S31600,316L,S31603 OD: ... ,1551,A387Cr.12,4137,4140,4340,431,S43100… Stainless Steel: ANSI ASTM 304,S30400,304L,S30403,316,S31600,316L,S316033)Specification ... . We will try our best to satified you. Big Forgings Flange in Stainless Steel