... Carbon Steel Flange2)Material: Carbon Steel, Alloy Steel, Stainless Steel Carbon steel: AISI 1020,1035,1045,1046,GrD, ... ,1551,A387Cr.12,4137,4140,4340,431,S43100… Stainless Steel: ANSI ASTM 304,S30400,304L,S30403,316,S31600 ... Delivery5)Quality Control: Impact Test, UT, And so on.6)Certificate:7)Delivery: 15-45Days8)Package: Standard Package ... best to satified you. Big Forgings Flange in Stainless Steel