# ISO 818:1975 — Withdrawn and superseded ISO standards For ISO 818:1975, item title is Fibre building boards — Definition — Classification; status code is 9599; successor is ISO/PWI 818; withdrawn / published date is 1975-01-01, recorded from its source on 2026-08-05. - **Identifier:** ISO 818:1975 _(verified: appears in the quote below)_ - **Item title:** Fibre building boards — Definition — Classification _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO/PWI 818 - **Withdrawn / published date:** 1975-01-01 _(verified: appears in the quote below)_ ## What the source says > 5170,IS,,ISO 818:1975,Fibre building boards — Definition — Classification,Panneaux de fibres — Définition — Classification,1975-01-01,1,"['79.060.20','01.040.79']",ISO/TC 89,9599,,[26708],"['en','fr']",1,"
The sheet material, generally exceeding 1.5 mm in thickness, shall be classified according to its density. The types of boards are subdivided into soft, medium and hard. Replaces ISO Recommendation R 818-1968 with which it is technically identical.
" ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).