The Blade of the Knife

The Sharpest Edge

The manufacturing of a Marttiini blade is a demanding and time-consuming process. First a steel mass is rolled into a steel strip, out of which blade preforms are cut. The preforms are then tempered and cooledto the correct hardness.


The basis for the sharpness of a Marttiini knife is its machine ground sharpening angle. At Marttiini's factory in Rovaniemi a blade preform goes through various production phases before being ready for the final critical operation. This phase calls for extraordinary craftsmanship as at the final stage the blade is hand ground, giving it the famous Marttiini sharpness.


Although manufacturing knives is always based on solid old-school craftsmanship, there's a fair share of modern technology involved as well. Marttiini combines the latest automated technology and traditional hands on craftmanship in the manufacturing process, creating the renowned Marttiini quality.

 

 


Stainless chromium steel

Stainless chromium steel

Chromium steel is an easy-to-maintain and stainless-grade blade material the sharpness of the blade of which preserves for a long time.

A typical portion of chromium in the steel alloy is 14%, and the blade hardness is HRC 53-55. In some models, we also use high-carbon stainless steel, where the chromium content is 13-18% depending on the alloy. Depending on the model, these blades are tempered to hardness HRC 52-58. Chromium steel can also, for example, be coated with a Martef coating.

Sharpening of chromium steel can be done with a diamond sharpener. Read more.
 

Carbon steel

Carbon steel

The carbon steel blade is especially suitable for carving and is also easy to sharpen to its original sharpness. The regular carbon steel (Cr 0.3%; C 0.75%) has a hardness of HRC 55-57. We also use forged carbon steel (Cr 0.6%; C 0.84%) which is tempered to the hardness HRC 59.5.

It is important to dry it thoroughly after use when caring for a carbon steel blade. It is also good to treat it regularly with salt-free oil, e.g., food oil. Carefully handled carbon steel steels remain rust free and has a very long service life.
Sharpening of carbon steel can be done with a whetstone. Read more.

 

Carbinox T508

Carbinox T508

The Carbinox T508 blade combines the best features of carbon and chromium steel, such as durability, toughness, and easy sharpening. Steel alloy (Cr 8.7%; 0.50%) is tempered to hardness HRC 58.


The material is not classified as stainless but has better resistance to corrosion than conventional carbon steel. Careful cleaning and drying of the blade after use is sufficient for basic care of the Carbinox blade. We recommend oiling the blade with salt-free oil from time to time.


Sharpening of Carbinox can be easily done with a diamond sharpener. Read more.
 

Damascus

Damascus

The Damascus blade is produced by combining two different steel grades (Cr 14% and 18%; C 1.05% and 0.6%) in thin layers. The blade has 120 layers which are embedded to each other under high pressure at high temperature. The result is a very nicely textured, stainless, and very hard (HRC 60) blade that stays sharp for a long time.


Sharpening of the Damascus blade can be easily done with a diamond sharpener. Read more.
 

Martef steel coating

Martef steel coating

The dirt and moisture repellent Martef coating reduces friction to almost none. Thanks to the coating, the blade moves very smoothly in the material to be cut. Cleaning the Martef coated blade after use is very easy.

Martef coated blades are made of stainless chromium steel.