JSA - JIS B 7726

Rockwell hardness test - Verification and calibration of testing machines and indenters

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Organization: JSA
Publication Date: 21 August 2017
Status: active
Page Count: 34
ICS Code (Mechanical testing of metals): 77.040.10
ICS Code (Mechanical testing): 19.060
scope:

This Standard specifies two separate methods of verification of testing machines (direct and indirect) for determining Rockwell hardness in accordance with JIS Z 2245.

This Standard is applicable to stationary and portable Rockwell hardness and Rockwell superficial hardness testing machines (hereafter referred to as testing machines) related to metal materials.

NOTE 1 Attention is drawn to the fact, in ISO 6508-1 : 2015, that the use of tungsten carbide composite for ball indenters (hereafter referred to as hardmetal ball) is considered to be the standard type of Rockwell indenter ball. Steel indenter balls may continue to be used only when complying with ISO 6508-1, Annex A. This Standard is intended to adopt hardmetal balls as the standard intenter at the time of next revision

NOTE 2 Attention is drawn to the fact that the result obtained with hardmetal balls may be significantly different from the result obtained with a steel balls

NOTE 3 Rockwell hardnesses are classified into Rockwell regular hardness and Rockwell superficial hardness is ISO 6508-1 while they are respectively described as "Rockwell hardness" and "Rockwell superficial hardness" in this Standard

NOTE 4 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 6508-2 : 2015 Metallic materials - Rockwell hardness test - Part 2 : Verification and calibration of testing machines and indenters (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/lEC Guide 21-1.

Document History

JIS B 7726
August 21, 2017
Rockwell hardness test - Verification and calibration of testing machines and indenters
This Standard specifies two separate methods of verification of testing machines (direct and indirect) for determining Rockwell hardness in accordance with JIS Z 2245. This Standard is applicable to...
August 20, 2010
Rockwell hardness test - Verification and calibration of testing machines
This Standard specifies a method of verification and calibration of testing machines for determining Rockwell hardness (scales A, B, C, D, E, F, G, H, K, N, T) in accordance with JIS Z 2245. It is...
November 20, 1997
Rockwell Hardness Test - Verification of Testing Machines
A description is not available for this item.
January 1, 1993
Rockwell and Rockwell Superficial Hardness Testing Machines
A description is not available for this item.

References

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