ISO 4545-2:2017 PDF

Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines

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Title (English):

ISO 4545-2:2017

Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: December 14, 2017
Edition:: ISO IS 4545 edition 2 version 1
ICS:: 77.040.10

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Description (English):

ISO 4545-2:2017 specifies the method of verification and calibration of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545‑1. 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 will be verified independently for each method.

Technical details

Technical committee: ISO/TC 164/SC 3 - Hardness testing
SKU: ISO 4545-2:2017

Abstract

Overview

ISO 4545-2:2017 - "Metallic materials - Knoop hardness test - Part 2" specifies procedures for the verification and calibration of Knoop hardness testing machines used on metallic materials. It defines both a direct method (calibration of test force, indenter geometry, and diagonal-length measuring system) and an indirect method (overall performance check using calibrated reference blocks). The standard requires traceability to national standards and documents results in a verification report or calibration certificate.

Key topics and requirements

Scope and conditions
- Applies to Knoop hardness testing in accordance with ISO 4545-1.
- Verifications should normally be performed at (23 ± 5) °C and instruments must be traceable.
Direct verification (Clause 5)
- Test force calibration: measure each force across the machine’s force range; use an elastic proving device in accordance with ISO 376:2011 (class 1) or balanced calibrated masses (±0.2% accuracy). Specific maximum permissible relative errors are defined by force ranges.
- Indenter verification: geometric checks (polished faces; angles and alignment). Example tolerances: angle α = 172.5° ± 0.1°, angle β = 130° ± 1.0°, indenter constant c within ±1.0% of 0.07028, axis misalignment ≤ ±0.5°, line-of-junction

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and requirements

Scope and conditions
- Applies to Knoop hardness testing in accordance with ISO 4545-1.
- Verifications should normally be performed at (23 ± 5) °C and instruments must be traceable.
Direct verification (Clause 5)
- Test force calibration: measure each force across the machine’s force range; use an elastic proving device in accordance with ISO 376:2011 (class 1) or balanced calibrated masses (±0.2% accuracy). Specific maximum permissible relative errors are defined by force ranges.
- Indenter verification: geometric checks (polished faces; angles and alignment). Example tolerances: angle α = 172.5° ± 0.1°, angle β = 130° ± 1.0°, indenter constant c within ±1.0% of 0.07028, axis misalignment ≤ ±0.5°, line-of-junction

ISO 4545-2:2017 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

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