MSS SP-55 is frequently used to supplement major (such as ASTM A216 or A351), providing the high-resolution visual detail that broader material standards often lack.
MSS SP-55 is a visual inspection standard. The "work" defined in this document establishes the acceptance criteria for the surface quality of steel castings. It is primarily used by manufacturers and end-users to determine if surface imperfections are acceptable or if they require repair (grinding or welding). mss sp55 standard pdf work
Mold or core sand trapped within the surface layer of the casting. MSS SP-55 is frequently used to supplement major