ISO/TR 20174:2020

This document provides a Japanese grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608.
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.
Types of aluminium and aluminium alloys are listed in accordance with the grouping system of ISO/TR 15608:2017, Table 2.
Types of titanium and titanium alloys are listed in accordance with the grouping system of ISO/TR 15608:2017, Table 5.
This document covers grouping systems for the following standardized materials:
-  steels;
-  aluminium and its alloys;
-  titanium and its alloys.