# ISO 335:1974 — Withdrawn and superseded ISO standards

For ISO 335:1974, item title is Hard coal — Determination of caking power — Roga test; status code is 9599; successor is ISO/WD 335; withdrawn / published date is 1974-10-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 335:1974 _(verified: appears in the quote below)_
- **Item title:** Hard coal — Determination of caking power — Roga test _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/WD 335
- **Withdrawn / published date:** 1974-10-01 _(verified: appears in the quote below)_

## What the source says

> 4281,IS,,ISO 335:1974,Hard coal — Determination of caking power — Roga test,Houille — Détermination du pouvoir agglutinant — Essai Roga,1974-10-01,1,['73.040'],ISO/TC 27,9599,,[1851],"['en','fr']",4,<p>The caking power of a coal is defined by the mechanical strength of the crucible coke obtained by carbonization under standard conditions of an intimate mixture of 1 g of coal and 5 g of standard anthrazite. The crucible coke obtained is then submitted to a drum test in a strictly prescribed manner and the Roga Index is calculated from the results.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).