Welding - Grouping systems for materials - European materials (ISO/TR 20172:2009)
This Technical Report 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. This Technical Report covers grouping systems for the following standardized materials:
b) aluminium and its alloys;
c) copper and its alloys;
d) cast irons.
In case of dispute, for example where variations in properties such as thickness and yield strength occur, ISO/TR 15608 applies.