# ISO 4493:1981 — Withdrawn and superseded ISO standards

For ISO 4493:1981, item title is Metallic powders — Determination of hydrogen reducible oxygen content; status code is 9599; successor is ISO 4491-3:1989; withdrawn / published date is 1981-08-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4493:1981 _(verified: appears in the quote below)_
- **Item title:** Metallic powders — Determination of hydrogen reducible oxygen content _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4491-3:1989
- **Withdrawn / published date:** 1981-08-01 _(verified: appears in the quote below)_

## What the source says

> 10390,IS,,ISO 4493:1981,Metallic powders — Determination of hydrogen reducible oxygen content,Poudres métalliques — Détermination de la teneur en oxygène réductible par l'hydrogène,1981-08-01,1,['77.160'],ISO/TC 119/SC 2,9599,,[10386],"['en','fr']",9,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).