... Steel;Stainless Steel;Alloy Steel, Forged flange, casting flange 1.FlangeA ,Material:Carbon Steel(10#, 20#,A3,Q235A,20G,16Mn,ASTM A105,A181, A182, A350, A403 etc.);Stainless Steel ... (304 ,304L,316,316L etc.);Alloy Steel(16MnR,Cr5Mo,12Cr1MoV,10CrMo910,15CrMo,12Cr2Mo1,A335P22 ... 6>.Blind Plate <7>.Flat Plate <8>. Abnormity Flange D,SPEC: 1/2- 36inch steel flange