ISO/TR 20172:2006 provides a European grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608.
It may also apply for other purposes as heat treatment, forming, non destructive testing. Types of steels in accordance with the grouping system of ISO/TR 15608:2005, Table 1.
This Technical Report covers grouping systems for the following standardized materials:
- aluminium and its alloys;
- nickel and its alloys;
- copper and its alloys;
- titanium and its alloys;
- zirconium and its alloys;
- cast iron.