ALLEGHENY LUDLUM TYPE 201 stainless steel is similar to Type 301 in many ways, with applications ranging from structural members to auto wheel covers. The alloy can be substituted for Type 304 in a variety of mild environments. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength. It also includes information on heat treating. Filing Code: SS-616. Producer or source: Allegheny Ludlum Corporation. See also Alloy Digest SS-997, September 2007.