Which Steel Should You Choose for Your Kitchen Knives?

There are several types of steel, each possessing different qualities depending on the percentages of components used. There are steels known as “carbon” which are primarily made of iron and carbon (0.6 to 1%), and “stainless” steels that combine carbon (0.2 to 1%), chrome (12 to 17%), molybdenum (0 to 1%), and vanadium (0 to 2%). Each of these components has a specific role that ensures a high quality. For example, carbon provides hardness, molybdenum and vanadium enhance corrosion resistance, and chrome ensures stainless properties. Choosing steel is always a balancing act between corrosion resistance and mechanical strength.

Therefore, pay close attention to the presence of these components when purchasing your knives! The fewer components there are, the lower the price, and consequently, the lower the quality!

Carbon Steel:

Loyal to its name, carbon steel consists of pure iron in crystal form, interspersed with carbon grains. There are three types of carbon steel: low carbon, medium carbon, and high carbon steels.

The carbon content in the steel influences the blade’s strength. In terms of performance, carbon steel is generally finer and less hard than stainless steel. Consequently, the sharpness of the blade is greater compared to a stainless steel blade. Additionally, sharpening is easier due to its fine structure.

The higher the carbon content, the more it hardens during heat treatment. However, as the blade becomes harder, it also becomes more fragile. Although it can be sharper, caution must be exercised to avoid damaging it. Moreover, a carbon steel blade is relatively sensitive to corrosion and is not recommended for humid environments.

Stainless Steel:

Iron oxidizes significantly in the presence of air and moisture. However, in the early twentieth century, metallurgists discovered that by adding a high quantity of chrome, steel could resist corrosion. Steel becomes stainless at a concentration of 16% Cr.

The combination of carbon steel with metals like chrome, molybdenum, and vanadium provides improved corrosion resistance.

While stainless steel blades are indeed resistant to corrosion, they are generally less sharp than blades with lower chrome content. The higher the carbon content, the more chromium carbides form, which can hinder the development of a fine and consistent edge.

Additionally, stainless steel requires less maintenance compared to carbon steel.

Some Insights on Steel Processing:

Hammered steel knives boast a very distinct design. Not only are they aesthetically pleasing, but they also feature air pockets that allow for perfect cutting: your food won’t stick to the blade!

Damas steel (or patterned steel) knives are particularly sharp. These knives possess unparalleled steel quality due to layers of hard and soft steel, providing a certain hardness and flexibility to the blade.

With these insights, you can now determine the type of steel suitable for your knives. Whether you prefer a stainless steel blade for corrosion resistance and low maintenance or a high carbon blade for optimal cutting quality but with a greater sensitivity to corrosion.