ASTM A 956 - 06 Standard Test Method for Leeb Hardness Testing of Steel Products

American Society for Testing and Materials (ASTM). Current edition approved Sept. 1, 2006. Published September 2006. Originally approved in 1996. Last previous edition approved in 2002 as A 956 – 02. 12 p. This test method covers the determination of the Leeb hardness of steel, cast steel, and cast iron (Part A), including the methods for the verification of Leeb hardness testing instruments (Part B), and the calibration of standardized test blocks (Part C).