American Society for Testing and Materials (ASTM). Current edition approved April 10, 2003. Published June 2003. Originally published in 1972. Last previous edition approved in 2000 as A 656/A 656M – 00a. 2 p. This specification covers two types and four strength grades of high-strength low-alloy, hot rolled structural steel plate for use in truck frames, brackets, crane booms, rail cars, and similar applications. Steels that conform to this specification offer improved formability.