This Technical Report provides a uniform system for grouping of materials for welding purposes. It may also apply to other purposes such as heat treatment, forming, non-destructive testing.

This Technical Report 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 iron.