IS 1586 : Part 1 : 2025/ISO 6508-1 : 2023 Metallic Materials - Rockwell Hardness Test - Part 1 Test Method
Revised Standard from Last Update.
NATIONAL FOREWORD
This Indian Standard (Part 1) (Sixth Revision) which is identical to ISO 6508-1 : 2023 'Metallic materials - Rockwell hardness test - Part 1: Test method' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Mechanical Testing of Metals Sectional Committee and approval of the Metallurgical Engineering Division Council.
This standard was first published in 1960 and subsequently revised in 1968, 1988, 2000, 2012 and 2018. This revision has been undertaken to align with the latest version ISO 6508-1 to harmonize it with the latest developments that have taken place at international level.
This standard is published in three parts. Other parts in this series are:
Part 2 - Verification and calibration of testing machines and indenters
Part 3 - Calibration of reference blocks
The main changes compared to the previous edition are as follows:
a) Removal of note related to the use of tungsten and steel ball indenters (1);
b) Removal of the year from the normative references specified and various places throughout the body of the standard (2);
c) Addition of 3, terms and definitions;
d) Added additional information for the use of single-piece spherically tipped indenters (6.3 Note 1);
e) Added the table reference and table title (7.4);
f) Modified the uncertainty of the results section to only provide a single reference for the determination of uncertainty (9); and
g) Modified Annex G to remove the 'procedure without bias (M2)' method for determining uncertainty.
The text of ISO standard has been approved as suitable for publication as in Indian Standard without deviations. Certain terminologies and conventions are, however, not identical with those used in Indian Standard. Attention is especially drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, it should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker.
In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their place are listed below along with their degree of equivalence for the edition indicated:
| International Standard | Corresponding Indian Standard | Degree of Equivalence |
| ISO 6508-2 : 2023 | IS 1586 (Part 2) : 2025/ISO 6508-2 : 2023 - Metallic materials - Rockwell hardness test: Part 2 Verification and calibration of testing machines and indenters (sixth revision) | Identical |
| ISO 6508-3 : 2023 | IS 1586 (Part 3) : 2025/ISO 6508-3 : 2023 - Metallic materials - Rockwell hardness test: Part 3 Calibration of reference blocks (sixth revision) | Identical |
In reporting the result of a test or analysis made in accordance with this standard, it shall be rounded off in accordance with IS 2 : 2022 'Rules for rounding off numerical values (second revision)'.