What is s steel flange (2)?

Currently, the most common materials for flanges are: | |
Carbon steel | • ASTM A105/A266 Gr.2 (high temperature carbon steel flanges) • ASTM A350 LF1 to LF3 (low temperature carbon steel flanges) • ASTM A694 Gr. F42/F52/F56/F60/F65 (high yield carbon steel flanges to match API 5L linepipes) |
Alloy Steel | • ASTM A182 Gr. F1/F2/F5/F9/F11 Cl.2/F12 Cl.2/F22 Cl.3/F91 (alloy steel flanges) |
Stainless / Duplex Steel | • ASTM A182 F304/304L, 316/316L, 321, 347, 348 (stainless steel flanges), 904/904L • ASTM A182 F51 (duplex flanges)/F53-F55 (superduplex flanges) |
Nickel Alloys / Superalloys | • ASTM B166 UNS NO6600 (Inconel 600) • ASTM B564 UNS N06625 (Inconel 625) • ASTM B425 UNS-NO8800 (Incoloy 800) • ASTM B564 UNS N08825 (Incoloy 825) • ASTM B160 UNS N0200 (Nickel 200) • ASTM B564 UNS N04400 (Monel 400) • ASTM B564 UNS N10276 (Hastelloy C-276) |
Titanium | • ASTM B381 Gr.2 (Titanium) |