American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2006. Published January 2007. Originally approved in 1972. Last previous edition approved in 2000 as B 573 – 00. 3 p. This specification covers nickel-molybdenum-chromium- iron alloys (UNS N10003 and UNS N10242) rod for use in general corrosive service.