# ISO 683-15:1976 — Withdrawn and superseded ISO standards

For ISO 683-15:1976, item title is Heat-treated steels, alloy steels and free-cutting steels — Part 15: Valve steels for internal combustion engines; status code is 9599; successor is ISO 683-15:1992; withdrawn / published date is 1976-04-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 683-15:1976 _(verified: appears in the quote below)_
- **Item title:** Heat-treated steels, alloy steels and free-cutting steels — Part 15: Valve steels for internal combustion engines _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 683-15:1992
- **Withdrawn / published date:** 1976-04-01 _(verified: appears in the quote below)_

## What the source says

> 4873,IS,,ISO 683-15:1976,"Heat-treated steels, alloy steels and free-cutting steels — Part 15: Valve steels for internal combustion engines","Aciers pour traitement thermique, aciers alliés et aciers pour décolletage — Partie 15: Aciers pour soupapes de moteurs à combustion interne",1976-04-01,1,"['77.140.10','27.020','77.140.20']",ISO/TC 17/SC 4,9599,,[4874],"['en','fr']",5,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).