# ISO 4547:1993 — Withdrawn and superseded ISO standards

For ISO 4547:1993, item title is Metallic materials — Hardness test — Calibration of standardized blocks to be used for Knoop hardness testing machines; status code is 9599; successor is ISO 4545-3:2005; withdrawn / published date is 1993-03-14, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4547:1993 _(verified: appears in the quote below)_
- **Item title:** Metallic materials — Hardness test — Calibration of standardized blocks to be used for Knoop hardness testing machines _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4545-3:2005
- **Withdrawn / published date:** 1993-03-14 _(verified: appears in the quote below)_

## What the source says

> 10457,IS,,ISO 4547:1993,Metallic materials — Hardness test — Calibration of standardized blocks to be used for Knoop hardness testing machines,Matériaux métalliques — Essai de dureté — Étalonnage des blocs de référence à utiliser pour les machines d'essai de dureté Knoop,1993-03-14,1,['77.040.10'],ISO/TC 164/SC 3,9599,,[37737],"['en','fr']",3,"<p>The method specified is applicable only for determining Knoop hardness in accordance with ISO 4545 giving indentations with long diagonals longer than or equal to 20 micrometres. Describes manufacture of the block, standardizing machine, standardizing procedure, number of indentations, uniformity of hardness, marking and test certificate. Annex A de

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).