British Standards Document
PD CEN ISO/TR 20172
Welding - Grouping systems for materials - European materials (ISO/TR 20172:2021)

https://doi.org/10.3403/30374670U

PD CEN ISO/TR 20172 is maintained by WEE/36. The current release of this standard is:

PD CEN ISO/TR 20172:2021 Welding - Grouping systems for materials - European materials (ISO/TR 20172:2021)

https://doi.org/10.3403/30374670 (published 12/05/2021)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

PD CEN ISO/TR 20172:2009 [current until 12/05/2021]
PD CEN ISO/TR 20172:2006 [current until 31/07/2009]