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.
ISO/TR 20172:2009 covers grouping systems for the following standardized materials:
– aluminium and its alloys;
– copper and its alloys;
– cast irons.