ASTM A 403/A403M - 13a Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2013. Published October 2013. Originally approved in 1956. Last previous edition approved in 2013 as A403/A403M–13. 9 p. This specification covers wrought stainless steel fittings for pressure piping applications.
Several grades of austenitic stainless steel alloys are included in this specification Grades are designated with a prefix, WP or CR, based on the applicable ASME or MSS dimensional and rating standards, respectively.