# ISO 4945:1977 — Withdrawn and superseded ISO standards

For ISO 4945:1977, item title is Steel — Determination of nitrogen content — Spectrophotometric method; status code is 9599; successor is ISO 4945:2018; withdrawn / published date is 1977-12-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4945:1977 _(verified: appears in the quote below)_
- **Item title:** Steel — Determination of nitrogen content — Spectrophotometric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4945:2018
- **Withdrawn / published date:** 1977-12-01 _(verified: appears in the quote below)_

## What the source says

> 10960,IS,,ISO 4945:1977,Steel — Determination of nitrogen content — Spectrophotometric method,Acier — Dosage de l'azote — Méthode spectrophotométrique,1977-12-01,1,['77.080.20'],ISO/TC 17/SC 1,9599,,[67387],"['en','fr']",6,"<p>This method is applicable to non-alloy and low-alloy steels containing between 0.002 % (m/m) and 0.050 % (m/m) of nitrogen and less than 0.6 % (m/m) of silicon. It allows the determination only of the nitrogen content which can be converted to an ammonium salt. Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.</p>"

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).