Difference between material hastelloy C276 and A494 CW-12MW?

Answer 1

Without getting technical on this, the simple answer is Hastelloy C-276 is a wrought material. Hastelloy is also a trademarked name for the material by Haynes International. CW12MW is an (almost) equivalent material in a cast form. Either sand or investment cast. There is a slight chemistry difference between the two, but for most industrial applications either works for corrosion resistance. Some companies call it Alloy-C.

Answer 2

Hastelloy C276 is a nickel-molybdenum-chromium superalloy known for its corrosion resistance in a wide range of environments. A494 CW-12MW, on the other hand, is a cast superalloy with higher nickel and molybdenum content designed for high-temperature applications such as in power generation or petrochemical industries. CW-12MW offers excellent resistance to both oxidation and corrosion at elevated temperatures compared to Hastelloy C276.