# ISO 6721-9:1997 — Withdrawn and superseded ISO standards

For ISO 6721-9:1997, item title is Plastics — Determination of dynamic mechanical properties — Part 9: Tensile vibration — Sonic-pulse propagation method; status code is 9599; successor is ISO 6721-9:2019; withdrawn / published date is 1997-06-05, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6721-9:1997 _(verified: appears in the quote below)_
- **Item title:** Plastics — Determination of dynamic mechanical properties — Part 9: Tensile vibration — Sonic-pulse propagation method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6721-9:2019
- **Withdrawn / published date:** 1997-06-05 _(verified: appears in the quote below)_

## What the source says

> 25913,IS,,ISO 6721-9:1997,Plastics — Determination of dynamic mechanical properties — Part 9: Tensile vibration — Sonic-pulse propagation method,Plastiques — Détermination des propriétés mécaniques dynamiques — Partie 9: Vibration en traction — Méthode de propagation de signaux acoustiques,1997-06-05,1,['83.080.01'],ISO/TC 61/SC 5,9599,,[74987],"['en','fr']",7,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).