... ASTM SCH40 stainless steel flange material:stainless steel standard:ANSI pressure:150#-2500# ASTM SCH40 stainless steel flangesize1/2" - 24" ASME B16.525"- 60" ASME B16 ... B, C, D, EstandardASME B16.5 & ASME B16.47materialCarbon steel (ASTM A105,A350 LF2,etc)Stainless steel (ASTM A182 F304, F304L,F316,F316L,F321 ... F12,F11,F22,F5,F9,F91,etc)Pipeline steel (ASTM A694 F42 F46 F52 F56 F60 F65 F70,etc) ...