EN 10020 isolates stainless steels as a unique category distinct from other alloy steels. To be classified as stainless under this standard, the steel must have a chromium content of at least 10.5% and a maximum carbon content of 1.2%. The standard further divides stainless steels into:
Official standards are typically copyrighted. You can find comprehensive summaries or purchase the full document through these official portals: BSI Knowledge: BS EN 10020:2000 MCHIP Technical Summary (PDF) Scribd Classification Guide If you were looking for ICAO Doc 10020 (aviation software/EFBs) or the en 10020 pdf