Stainless Steel Flanges: ASTM A403 WP 304 304L 304H 316 316L 317 317L 321 310 347 904L etc. Carbon Steel: ASTM A105 A694 F42 46 52 56 60 65 70 A350 LF3 A350 LF2, etc Alloy Steel: ASTM A182 F1 F5 F9 F11 F22 F91 etc Others: Monel, Nickel, Inconel, Hastalloy, Copper, Brass, Bronze, Titanium, Tantalum, Bismuth, Aluminium, High Speed Steel, Zinc, Lead, etc.