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Knife blade hardening service

Knife blade hardening service

We offer customers a qualified blade hardening service (up to 100 cm). This service includes a free original test certificate with the exact hardness value of the cutting edge in HRC (Rockwell). This will give you a clear understanding of the actual end hardness of your blade after hardening. We harden all conventional stainless and non-stainless blade steels using the vacuum procedure (DIN-certified).

This is how it works:

  1. Shape your blade and pre-grind it to grit 150
    (the blade should still be 0.5 mm thick).
  2. Draw the outline of your knife blade on a sheet of paper
    (to keep track of the blade after hardening).
  3. Send us your knife with the outline drawing and information on the material as well as, if relevant, instructions for how to harden it
    (hand it in at one of our branches or mail it to us, using one of our special boxes (No. 909080) if required.
  4. We will return the hardened knife blade with the test certificate and spherical indention images within about 2-3 weeks of receipt.

Fee for the hardening service plus test certificate: € 29.90 (incl. VAT, excl. delivery fee).

Fee for the hardening service without test certificate: € 19.00 (incl. VAT, excl. delivery fee).

Hardness test with test certificate for knife blades

Have you always been curious about the hardness of your finished knife blade?
If so, you can use this service to get us to test the hardness (HRC) of your knife blade at its cutting edge. Heat treatment shops generally only perform HRC tests on the tang or back of the blade. However, testing these areas does not provide any reliable information about the hardness of the blade itself. Performing an HRC test at the cutting edge would destroy the blade.

Hardening test blade

This is why we use the Vickers hardness test, which uses very low test pressures and allows us to test a blade’s hardness right at the cutting edge without destroying it.
This method simply involves minimal grinding of the cutting edge, which is then returned to its original state after the test. On completion, you will receive a test certificate with spherical indention images and the Vickers values converted to HRC.

Fee for the hardness test plus test certificate: € 15 (incl. VAT, excl. delivery fee).

Hardening test detail