In summary, ASTM A351 CF8M stainless steel castings shows better corrosition resistance, while CF8 stainless steel castings have lower cost. The selection of these two alloys mainly depend on the working environment. If you are unfamilar with them, CFS can recommend a good alloy for your cast stainless steel product according to our …
A forged valve body is produced by forging and machining solid steel. The key specifications for cast steel valves body materials are ASTM A216 (WCA, WCB, WCC), ASTM A352 LCB/LCC (low-temperature), and ASTM A351 CF8/CF8M. ASTM A105, A350 and A182 cover body materials for small size (or high pressure) forged valves.
CF8M stainless steel is the most widely used US standard austenitic stainless steel casting grade. Its equivalent type is cast 316. From the name CF8M, the letter "C" means the alloy is mainly for the purpose of corrosion resistance. The letter "F" is the approximate location on the iron-chromium-nickel (FeCrNi) ternary diagram.
ASTM A351/A351M, 2018 Edition, May 1, 2018 - Standard Specification for Castings, Austenitic, for Pressure-Containing Parts. This specification 2 covers austenitic steel castings for valves, flanges, fittings, and other pressure-containing parts (Note 1). NOTE 1—Carbon steel castings for pressure-containing parts are covered by …
ASTM A351 CF8M. Austenitic stainless steel classified for Castings, Austenitic, for Pressure-Containing Parts. UNS# J92900 A. As with CF3M, the first character (C) means the alloy is intended for "Corrosion Resistant" service. The second character (F) is the
TABLE 2 Chemical Requirements NOTE 1—Tungsten is a new element for Table 2. Element, % (max, ex-cept where range is given) CF3, CF3A CF8, CF8A CF3M, CF-3MA CF8M CF3MN CF8C CF10 CF-10M (J92-901) CH8 CH10 CH20 CK20 HK30 HK40 HT30 CF
Note 1: Carbon steel castings for pressure-containing parts are covered by Specification A216/A216M, low-alloy steel castings by Specification A217/A217M, and duplex stainless steel castings by Specification A995/A995M. 1.2 A number of grades of austenitic steel castings are included in this specification. Since these grades possess varying