American Society for Testing and Materials (ASTM). Current edition approved Sept. 1, 2007. Published October 2007. Originally approved in 1942. Last previous edition approved in 2002 as A 255 – 02. 26 p. These test methods cover the identification and description of test methods for determining the hardenability of steels. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of steel from the chemical composition based on the original work by M. A. Grossman.