ISO/CD TR 20173
Welding — Grouping systems for materials — American materials
Reference number
ISO/CD TR 20173
Edition 4
Committee Draft
ISO/CD TR 20173
A draft is being reviewed by the committee.
Will replace ISO/TR 20173:2018


This document provides an American grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608. A number of Canadian, Australian and New Zealand materials commonly used in North America are also included.

It can 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 15608:2017, Table 1.

This document covers grouping systems for the following standardized materials:

— steel;

— aluminium and its alloys;

— nickel and its alloys;

— copper and its alloys;

— titanium and its alloys;

— zirconium and its alloys;

— cast irons.

General information

  •  : Under development
    : CD approved for registration as DIS [30.99]
  •  : 4
  • ISO/TC 44/SC 10
  • RSS updates

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