# ISO/TR 20173:2009 — Withdrawn and superseded ISO standards

For ISO/TR 20173:2009, item title is Welding — Grouping systems for materials — American materials; status code is 9599; successor is ISO/TR 20173:2018; withdrawn / published date is 2009-09-29, recorded from its source on 2026-08-05.

- **Identifier:** ISO/TR 20173:2009 _(verified: appears in the quote below)_
- **Item title:** Welding — Grouping systems for materials — American materials _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/TR 20173:2018
- **Withdrawn / published date:** 2009-09-29 _(verified: appears in the quote below)_

## What the source says

> 51793,TR,,ISO/TR 20173:2009,Welding — Grouping systems for materials — American materials,Soudage — Systèmes de groupement des matériaux — Matériaux américains,2009-09-29,2,['25.160.20'],ISO/TC 44/SC 10,9599,[39262],[69020],"['en','fr']",58,"<p>ISO/TR 20173:2009 provides an American grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608:2005.</p><p>It may also apply for other purposes, such as heat treatment, forming, and non-destructive testing. Types of steels are listed in accordance with the grouping system of ISO/TR 15608:2005, Table 1.</p><p>ISO/TR 20173:2009 covers grouping systems for the following standardized materials:

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).