INTERNATIONAL STANDARD ISO 16859-3
ISO 16859-3 Metallic materials — Leeb hardness test — Part 3: Calibration of reference test blocks
ISO 16859 consists of the following parts, under the general title Metallic materials —— Leeb hardness test:
ISO 16859-1 Metallic materials — Leeb hardness test — Part 1: Test method
ISO 16859-2 Metallic materials — Leeb hardness test — Part 2: Verification and calibration of the testing devices
ISO 16859-3 Metallic materials — Leeb hardness test — Part 3: Calibration of reference test blocks
Contents
Foreword
1 Scope
2 Normative references
3 Manufacture of reference test blocks
4 Calibration machine
4.1 General
4.2 Traceability
4.3 Requirements on calibration machines
4.4 Calibration of calibration machines
5 Calibration procedure
6 Number of test indentations
7 Uniformity of hardness
8 Marking
9 Validity
Annex A (normative) Requirements for Leeb hardness calibration machines
Annex B (informative) Measurement uncertainty of reference test block
Annex C (informative) Examples of reference test block
Bibliography
1 Scope
This part of ISO 16859 specifies a method for the calibration of reference test blocks that are used for the indirect verification of Leeb hardness testers according to ISO 16859-2 and for the periodic checking according to ISO 16859-1.
The procedures necessary to ensure metrological traceability of the calibration machine are also specified.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 16859-1, Metallic materials — Leeb hardness test — Part 1: Test method
ISO 16859-2, Metallic materials — Leeb hardness test — Part 2: Verification and calibration of the testing devices
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
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