# ISO 349:1975 — Withdrawn and superseded ISO standards

For ISO 349:1975, item title is Hard coal — Audibert-Arnu dilatometer test; status code is 9599; successor is ISO 349:2020; withdrawn / published date is 1975-01-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 349:1975 _(verified: appears in the quote below)_
- **Item title:** Hard coal — Audibert-Arnu dilatometer test _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 349:2020
- **Withdrawn / published date:** 1975-01-01 _(verified: appears in the quote below)_

## What the source says

> 4300,IS,,ISO 349:1975,Hard coal — Audibert-Arnu dilatometer test,Houille — Essai au dilatomètre Audibert-Arnu,1975-01-01,1,['73.040'],ISO/TC 27/SC 5,9599,,[71376],"['en','fr']",11,<p>Specifies a method for determining the swelling properties of hard coal when heated under standard conditions in a dilatometer. In performing the method a pencil made of powdered coal formed under pressure is inserted into a precisely calibrated narrow tube and topped by a calibrated steel rod which slides in the bore of the tube. The whole is heated at a constant and definite rate. By making regular readings of the displacement of the rod as a function of the temperature and expressing the displacements observe

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).