Big Forgings Material:Stainless steel ANSI ASTM 304,S30400 304L,S30403,316,S31600 ... Heavy Forged Carbon Steel Flange2)Material: Carbon Steel, Alloy Steel, Stainless Steel Carbon steel: AISI 1020,1035,1045,1046,GrD,Gr65 ... 1053,1551,A387Cr.12,4137,4140,4340,431,S43100… Stainless Steel: ANSI ASTM 304,S30400,304L,S30403,316,S31600,316L ... try our best to satified you. Big Forgings Flange in Stainless Steel