National foreword

This British Standard is the UK implementation of EN ISO 6507‑2:2018. It is identical to ISO 6507‑2:2018. It supersedes BS EN ISO 6507‑2:2005, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee ISE/101/5, Indentation hardness testing.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing.

This fourth edition cancels and replaces the third edition (ISO 6507‑2:2005), which has been technically revised.

The main changes compared to the previous edition are as follows:

all references of indentation diagonals, <0,020 mm, have been removed;
requirements for the calibration and verification of the measuring system have been revised;
requirements for the maximum permissible error in measuring a reference indentation have been revised;
recommendations for inspection and monitoring of the indenter have been moved to ISO 6507‑1;
requirements have been added to the test report for reporting the hardness values of reference blocks used;
Annex A has been revised.

A list of all parts in the ISO 6507 series can be found on the ISO website.

European foreword

This document (EN ISO 6507‑2:2018) has been prepared by Technical Committee ISO/TC 164 “Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2018, and conflicting national standards shall be withdrawn at the latest by September 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 6507‑2:2005.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 6507‑2:2018 has been approved by CEN as EN ISO 6507‑2:2018 without any modification.

1 Scope

This document specifies a method of verification and calibration of testing machines and diagonal measuring system for determining Vickers hardness in accordance with ISO 6507‑1.

A direct method of verification and calibration is specified for the testing machine, indenter and the diagonal length measuring system. An indirect verification method using reference blocks is specified for the overall checking of the machine.

If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently for each method.

This document is also applicable to portable hardness testing machines but not applicable to hardness testing machines based on different measurement principles, e.g. ultrasonic impedance method.

2 Normative references

3 Terms and definitions

4 General conditions

5 Direct verification

5.1 General

5.2 Calibration of the test force

5.3 Verification of the indenter

5.4 Calibration and verification of the diagonal measuring system

5.5 Verification of the testing cycle

5.6 Uncertainty of calibration/verification

6 Indirect verification

6.1 General

6.2 Test force and hardness levels

6.3 Measurement of reference indentation

6.4 Number of indentations

6.5 Verification result

6.6 Repeatability

6.7 Bias

6.8 Uncertainty of calibration/verification

7 Intervals between verifications

8 Verification report/calibration certificate

8.1 Vickers testing machine

8.2 Vickers indenter

Bibliography

BS EN ISO 6507-2:2018

Metallic materials. Vickers hardness test - Verification and calibration of testing machines

Current

Published:

31 Mar 2018