This specification covers general requirements and corresponding test methods for castings made of high-silicon molybdenum ferritic iron (SiMo). The requirements are prescribed for castings with microstructures of spheroidal graphite (SG) SiMo iron, compacted graphite (CG) SiMo iron, and mixed graphite or medium-nodularity graphite (MG) SiMo iron. MG iron microstructure is comprised of a mixture of spheroidal and compacted graphite shapes.
This specification covers: ordering information (including grade of silicon-molybdenum ferritic iron required, chemical composition requirements, microstructure and mechanical requirements, and special preparation for delivery); material, structural performance, and manufacturing practice; mechanical and chemical composition; workmanship, finish, and appearance; inspection and quality; certification; product marking; and packaging and package marking.