Heat-treat foil by steel
Stainless tool wrap keeps your blade scale-free and decarb-free through the kiln. Find your steel below for its austenitizing temperature and the SSTW grade — 321 for everyday work up to ~2000°F, 309 for hotter, longer soaks.
Simple carbon steels
Low-alloy steels
Tool steels
Stainless steels
Powder / high-alloy stainless
Don't see your steel?
The rule holds for any steel: 321 up to ~2000°F, 309 above. Both ship by the roll from the USA.
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