# ISO 6721:1983 — Withdrawn and superseded ISO standards

For ISO 6721:1983, item title is Plastics — Determination of damping properties and complex modulus by bending vibration; status code is 9599; successor is ISO 6721-1:1994 | ISO 6721-10:1997 | ISO 6721-3:1994 | ISO 6721-4:1994; withdrawn / published date is 1983-09-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6721:1983 _(verified: appears in the quote below)_
- **Item title:** Plastics — Determination of damping properties and complex modulus by bending vibration _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6721-1:1994 | ISO 6721-10:1997 | ISO 6721-3:1994 | ISO 6721-4:1994
- **Withdrawn / published date:** 1983-09-01 _(verified: appears in the quote below)_

## What the source says

> 13166,IS,,ISO 6721:1983,Plastics — Determination of damping properties and complex modulus by bending vibration,"Plastiques — Détermination des propriétés d'amortissement et du module complexe, au moyen de vibration en flexion",1983-09-01,1,['83.080'],ISO/TC 61/SC 2,9599,,"[13167,25912,13169,20987]","['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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).