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ASTM A956-06

Historical Revision

Standard Test Method for Leeb Hardness Testing of Steel Products

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1.1 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).

Note 1

The original title of this standard was "Standard Test Method for Equotip Hardness Testing of Steel Products."

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


Hardness of a material is a poorly defined term that may have many meanings depending on the type of test performed and the expectations of the person involved. The Leeb hardness test is of the dynamic or rebound type, which primarily depends both on the plastic and on the elastic properties of the material being tested. The results obtained are indicative of the strength and dependent on the heat treatment of the material tested.

The Leeb hardness test is a superficial determination only measuring the condition of the surface contacted. The results generated at that location do not represent the part at any other surface location and yield no information about the material at subsurface locations.

SDO ASTM: ASTM International
Document Number A956
Publication Date Sept. 1, 2006
Language en - English
Page Count 12
Revision Level 06
Supercedes
Committee A01.06
Publish Date Document Id Type View
Nov. 15, 2012 A0956-12 Revision
Sept. 1, 2006 A0956-06 Revision
July 10, 2002 A0956-02 Revision
Jan. 10, 2000 A0956-00 Revision