American Society for Testing and Materials (ASTM). Current edition approved Sept. 1, 2005. Published October 2005. Originally approved in 1995. Last previous edition approved in 2001 as A 949/A 949M – 01. 4 p. This specification covers spray-formed seamless ferritic/austenitic stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.