# ISO 4545:1993 — Withdrawn and superseded ISO standards

For ISO 4545:1993, item title is Metallic materials — Hardness test — Knoop test; status code is 9599; successor is ISO 4545-1:2005; withdrawn / published date is 1993-03-18, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4545:1993 _(verified: appears in the quote below)_
- **Item title:** Metallic materials — Hardness test — Knoop test _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4545-1:2005
- **Withdrawn / published date:** 1993-03-18 _(verified: appears in the quote below)_

## What the source says

> 10455,IS,,ISO 4545:1993,Metallic materials — Hardness test — Knoop test,Matériaux métalliques — Essai de dureté — Essai Knoop,1993-03-18,1,['77.040.10'],ISO/TC 164/SC 3,9599,,[37735],"['en','fr']",4,"<p>Specifies the method of Knoop hardness test covering test forces up to and including 9,807 N. The principle of the method is forcing a diamond indenter, in the form of a rhombic-based pyramid with specified angles between opposite faces at the vertex, into the surface of a test piece and measuring the long diagonal of the indentation left in the surface after removal of the test force. The Knoop hardness is proportional to the quotient obtained by dividing the test force by the projected area

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).