ISO 6507-3:2018 PDF

Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks

Название (английский):

ISO 6507-3:2018

Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 10 января 2018 г.
Издание:: ISO IS 6507 edition 4 version 1
ICS:: 77.040.10

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Описание (английский):

ISO 6507-3:2018 specifies a method for the calibration of reference blocks to be used for the indirect verification of Vickers hardness testing machines, as specified in ISO 6507‑2. The method is applicable only for indentations with diagonals ≥0,020 mm.

Технические детали

Технический комитет: ISO/TC 164/SC 3 - Hardness testing
SKU: ISO 6507-3:2018

Abstract

Overview

ISO 6507-3:2018 - "Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks" specifies a calibrated method for producing and certifying hardness reference blocks used for the indirect verification of Vickers hardness testing machines (as per ISO 6507-2). The standard applies only to indentations with diagonals ≥ 0.020 mm and defines manufacturing, dimensional, surface and calibration requirements to ensure traceable, repeatable hardness reference values.

Key topics and technical requirements

Scope and applicability: Calibration method for reference blocks used in indirect verification of Vickers testers; applicable for indentation diagonals ≥ 0.020 mm.
Reference block manufacture:
- Minimum thickness: ≥ 5 mm
- Maximum test surface area: ≤ 40 cm²
- Magnetism: blocks should be demagnetized (if steel)
- Flatness ≤ 0.005 mm; parallelism error ≤ 0.010 mm in 50 mm
- Surface roughness Ra ≤ 0.05 µm; no scratches interfering with indentations
- Block thickness or identifying mark recorded to detect regrind
Calibration machine requirements:
- Direct verification at intervals ≤ 12 months
- Verification of test force, indenter, diagonal measuring system and testing cycle
- Test-force verification tolerances: typically ±0.2% (normal hardness), ±0.3% (low-force), ±0.5% (microhardness) using ISO 376 traceable proving devices
Indenter specifications:
- Square-based diamond pyramid with face flatness ~ 0.0003 mm
- Pyramid angle 136° ± 0.1°; axis misalignment

Overview

Key topics and technical requirements

Scope and applicability: Calibration method for reference blocks used in indirect verification of Vickers testers; applicable for indentation diagonals ≥ 0.020 mm.
Reference block manufacture:
- Minimum thickness: ≥ 5 mm
- Maximum test surface area: ≤ 40 cm²
- Magnetism: blocks should be demagnetized (if steel)
- Flatness ≤ 0.005 mm; parallelism error ≤ 0.010 mm in 50 mm
- Surface roughness Ra ≤ 0.05 µm; no scratches interfering with indentations
- Block thickness or identifying mark recorded to detect regrind
Calibration machine requirements:
- Direct verification at intervals ≤ 12 months
- Verification of test force, indenter, diagonal measuring system and testing cycle
- Test-force verification tolerances: typically ±0.2% (normal hardness), ±0.3% (low-force), ±0.5% (microhardness) using ISO 376 traceable proving devices
Indenter specifications:
- Square-based diamond pyramid with face flatness ~ 0.0003 mm
- Pyramid angle 136° ± 0.1°; axis misalignment

ISO 6507-3:2018 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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