The latest edition (26th Edition) remains an indispensable tool for mechanical engineers, designers, and material testers:

Stahlschlüssel (Key to Steel) is a world-renowned cross-reference manual used to decode steel designations and find equivalent materials globally. Published by Verlag Stahlschlüssel Wegst GmbH since 1951, the latest 26th Edition (2025)

The publisher, Verlag Stahlschlüssel Wegst GmbH , provides digital access through the following official platforms:

"Exclusive" versions of the PDF often refer to editions that include proprietary steel grades from major manufacturers like ThyssenKrupp, ArcelorMittal, or Voestalpine. These grades are rarely found in public standards, making the Stahlschlüssel the only source for this data.