Rockwell Hardness Test Standards

The Rockwell hardness test method is specified by several national and international standards. In North America, most Rockwell hardness testing is performed in accordance with standards published by the ASTM (2) . In other countries throughout the world, industry testing may be in accordance with a nationally published standard, but increasingly, countries are adopting the ISO Rockwell hardness standards (3,4,5) The International Organization of Legal Metrology (OIML) publishes Rockwell hardness documents referred to as International Recommendations (6,7,8,9) for countries desiring to regulate Rockwell hardness testing for legal purposes. Presently, use of the OIML documents is very meager. Listed below are the document standards specifying requirements for Rockwell hardness testing, as well as other documents related to Rockwell hardness testing.

p>2.5.1 ASTM

ASTM E 18 – 2000, Standard Test Methods for Rockwell Hardness and
Rockwell Superficial Hardness of Metallic Materials

Related ASTM standards:
ASTM E 110 – 82 (Reapproved 1997), Standard Test Method for
Indentation Hardness of Metallic Materials by Portable Hardness Testers
ASTM E 140 – 97, Standard Hardness Conversion Tables for Metals

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ASTM standards can be purchased in the Store area of the ASTM web site.Using a credit card, you can download standards to your own computer; receive standards by fax, or by traditional mail. Standards vary in cost,based on their length. Average cost for an ASTM standard is about $25. A subscription service is also offered where subsets of standards can be accessed for a set fee. Standards can also be purchased from ASTM by contacting ASTM’s Customer Service Department at (610) 832–9585, Monday through Friday, 8AM-5PM Eastern Time.

2.5.2 ISO

ISO 6508-1 Metallic Materials – Rockwell hardness test (scales A, B, C, D, E, F, G, H, K, N, T) – Part 1: Test method, 1999-09-01 ISO 6508-2 Metallic Materials – Rockwell hardness test (scales A, B, C, D, E, F, G, H, K, N, T) – Part 2: Verification of testing machines, 1999-09-01 ISO 6508-3 Metallic Materials – Rockwell hardness test (scales A, B, C, D, E, F, G, H, K, N, T) – Part 3: Calibration of reference blocks, 1999-09-01

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Electronic copies of ISO standards may be purchased from ANSI’s

Electronic Standards Store at the American National Standards Institute web site. Paper copies of ISO standards may be purchased from Global Engineering

Documents as follows:

Global Engineering Documents

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Email: global@ihs.com


2.5.3 OIML

OIML International Recommendation No. 11 (1974), Verification and calibration of “Rockwell B" hardness standardized blocks

OIML International Recommendation No. 12 (1974), Verification and calibration of “Rockwell C" hardness standardized blocks

OIML International Recommendation No. 36 (1976), Verification of indenters for hardness testing machines (Systems: Brinell – Rockwell B, F, and T – Vickers – Rockwell C, A, and N)

OIML International Recommendation No. 39 (1981), Verification of hardness testing machines (Rockwell B, F, T - C, A, N systems

To contact or order documents:

OIML Publications may be purchased (in French and in English in most cases) from the Organization’s Secretariat (BIML).

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E-mail: biml@oiml.org