Self Hardening Steels
Steels that become martensitic or fully hard by air cooling from above their critical temperature or from the austenitizing temperature.
Related Links
Mushet steel
Tool steel
Air Hardening Steel | Byington Blades
self-hardening steel – Engineering Dictionary – EngNet
Tool Steels ? Air-Hardening, Medium Alloy, Cold Work Steels
Related Videos

Case Hardening

Heat Treat Episode 3: Oil-Quenching vs. Air-Hardening

How to Harden Mild Steel (Impossible!)

Intro to heat treatment of steel (hardening and tempering)

Stainless Steel Heat Treatment: Oil vs. Plate Quench
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Case Hardening
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Heat Treat Episode 3: Oil-Quenching vs. Air-Hardening
-
How to Harden Mild Steel (Impossible!)
-
Intro to heat treatment of steel (hardening and tempering)
-
Stainless Steel Heat Treatment: Oil vs. Plate Quench