Batch hardening of Alleima® 12C27 knife steel


Temperature should be equalized at 850°C (1560°F) for 30 minutes to avoid unnecessary temperature variations.


Batch furnace. 30 minutes in furnace.


Quench as rapidly as possible. For optimal results 600°C (1110°F) should be reached within 2 minutes or less.

Tempering (2 hours)
Hardness Temperature
59 HRC 175°C (345°F)
57 HRC 225°C (435°F)
54 HRC 350°C (660°F)