# ISO 537:1980 — Withdrawn and superseded ISO standards For ISO 537:1980, item title is Plastics — Testing with the torsion pendulum; status code is 9599; successor is ISO 537:1989; withdrawn / published date is 1980-03-01, recorded from its source on 2026-08-05. - **Identifier:** ISO 537:1980 _(verified: appears in the quote below)_ - **Item title:** Plastics — Testing with the torsion pendulum _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 537:1989 - **Withdrawn / published date:** 1980-03-01 _(verified: appears in the quote below)_ ## What the source says > 4610,IS,,ISO 537:1980,Plastics — Testing with the torsion pendulum,Plastiques — Essai au pendule de torsion,1980-03-01,1,['83.080.01'],ISO/TC 61,9599,,[4611],"['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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).