HCM 12A is a ferritic steel with high strength that was developed for use in superheater and reheater tubes and is also used in large diameter thick wall pipe for headers in power generation boilers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on heat treating. Filing Code: SA-464. Producer or source: Sumitomo Metal USA Corporation.