# ISO/TR 20172:2009 — Withdrawn and superseded ISO standards

For ISO/TR 20172:2009, item title is Welding — Grouping systems for materials — European materials; status code is 9599; successor is ISO/TR 20172:2021; withdrawn / published date is 2009-06-15, recorded from its source on 2026-08-05.

- **Identifier:** ISO/TR 20172:2009 _(verified: appears in the quote below)_
- **Item title:** Welding — Grouping systems for materials — European materials _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/TR 20172:2021
- **Withdrawn / published date:** 2009-06-15 _(verified: appears in the quote below)_

## What the source says

> 50640,TR,,ISO/TR 20172:2009,Welding — Grouping systems for materials — European materials,Soudage — Systèmes de groupement des matériaux — Matériaux européens,2009-06-15,2,['25.160.20'],ISO/TC 44/SC 10,9599,[39261],[75557],"['en','fr']",33,"<p>ISO/TR 20172:2009 establishes a European grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608. It is also applicable for other purposes such as heat treatment, forming and non-destructive testing.</p><p>ISO/TR 20172:2009 covers grouping systems for the following standardized materials:</p><p>– steel;</p><p>– aluminium and its alloys;</p><p>– copper and its alloys;</p><p>– cast irons.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).