Rockblade kilns


  • Sale
  • Regular price €30,00
Tax included.

Versatile carbon steel with good machinability and polishability. Also known as L2 steel. This steel is an excellent choice for knife blades. Ideal for hunting knives, skinning knives and bushcraft knives. Hardness 57-59 HRC.

Recommended operating sequence:

Normalization is a process intended to refine the grain and relieve the stress of the blades before hardening when necessary.
Condursal Z1100, can be used to reduce the surface decarburization and scaling.
Recommended time at temperature for variable thicknesses; once the knife has cooled and become black and magnetic, it can be heat retracted , be careful when handling hot blades.

(1st cycle) 1,650°F / 898°C (10-15 min) (2nd cycle) 1,500°F / 815°C (10-15 min) (3rd cycle) 1,350°F / 732°C (10-15min) 


Reduce fouling or surface decarburization.
Data are representative of temperatures and controlled heat treatment equipment (e.g. oven, salts, etc.). industry standard hardening.
Suggested hardening oil: Durixol V35 at 50°C

*Austenitizing time varies from 5 to 15 minutes depending on the heat treatment equipment and geometry of the lama. The times are minimized for people who heat treat in forge--forge and who heat treat without PID, if you use a heat treatment furnace, use the times provided according to the thickness of the steel.
* *Do not put the blades in the oven when they are cold, insert them at the austenitizing temperature or just below.

Austenitization temperature Waiting/dive time Expected Rc (as extinct)
1,465 to 1480°F / 801°C 5-15 minutes 64-65


Once the blade has undergone austenitization and is at room temperature, the blades must be tempered accordingly, the suggested times are to guarantee a temperature uniform and constant.
Note: the final hardness values ​​vary according to the initial hardness in the quenched state and the percentage of conversion to Martensite. Only reliable test methods, e.g. Calibrated Rockwell hardness tester, able to provide real hardness values. Hardness measuring files are relative and inaccurate test methods for reading the true hardness value.
Temper twice for 2 hours.

Temperature Hardness (guideline 2 hours x2)
300°F / 149°C 65
350°F / 177°C 63-64
400°F / 204°C 60-61
450°F / 232°C 57-58
500°F / 260°C 55-56
550°F / 288°C 53-54
600°F / 316°C 52-53
650°F / 343°C 50