Hardened flat steel N690

Steel is vacuum hardened and tempered to a hardness of 60HRC. It can be used immediately for blade production and thus shorten the time of knife production, or catch some "burner"... Using already hardened steel also minimizes the risk of deformation of the finished blade and eliminates the need for straightening.

This steel is only suitable for belt grinder owners and cannot be drilled with conventional drills or machined with conventional hand tools! It is very hard!

Steel N690 is a high-end steel designed for hardened tools with durable cutting edges such as knife blades, surgical cutting tools, disc knives for the meat industry, skate blades, etc.

Steel 690 is manufactured in Austria by Bohler by hot rolling. It can be perfectly machined and ground even after hardening. The steel is ideally heat treated and tempered, achieving very good mechanical properties on the facet. Hardness around 60 HRC after proper hardening meets most expected requirements for normal to moderate blade stresses. However, if the steel is drawn at a small angle virtually into the cut, it becomes very susceptible to pitting. If you cut with such a blade, you will most certainly destroy it.

Steel resists corrosion very well due to its high chromium content. Therefore, it is very often used for kitchen and hunting knives. Specifically for hunting knives, the treatment of the used blade occurs at a greater distance and therefore hunters appreciate this property.