... , 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750 Carbon Steel : ASTM A 105, ASTM A 181Alloy ... Steel : ASTM A 182, GR F1, F11, F22 ... , DIN2636, DIN2637, DIN2638, DIN2673B.S : BS4504 , BS4504, BS1560, BS10 Stainless Steel Lap Joint Flanges (ANSI B16.5)