Download the trial version of the "Key to Steel" app. If you use it daily, the $100–$200 for a USB license is cheaper than the cost of buying the wrong type of steel and scrapping a $10,000 part.
If you work in heat treatment, procurement, quality assurance, or mechanical engineering, you have probably heard the whisper of a legendary book. It is thick, densely packed with tiny fonts, and it goes by two names: Stahlschlüssel (German for "Steel Key") or Key to Steel (its English title). stahlschlussel key to steel pdf
Keep your alloys correct, and your standards straight. Do you use the Stahlschlüssel daily, or do you rely on free online cross-reference charts? Let us know in the comments below! Download the trial version of the "Key to Steel" app
The current edition (typically updated every 3–4 years) costs several hundred Euros. For a student or a small machine shop on a budget, that price tag is intimidating. Carrying the 1,000+ page hardcover version to a factory floor is also impractical. It is thick, densely packed with tiny fonts,