Materials

Signs of quality

The quality of a knife is decisively influenced by the grade of steel used. The most important characteristics of steel used to make the blade are corrosion resistance and hardness. They are achieved by the corresponding chemical composition and appropriate heat treatment. The expertise of a manufacturer shows itself in his ability to select the appropriate steel for the intended purpose. ZWILLING J.A. HENCKELS has this authority thanks to its long tradition in cutlery manufacturer and, in the past, also as a manufacturer of steel.

Different types of steel are used in the cutlery industry of which stainless steel has become predominant.

Carbon steel (normal steel)

Carbon steel is the oldest type. It has the disadvantage, however, of being highly susceptible to corrosion.

Stainless steel

The description "stainless" can be applied to any knife made of stainless steel such as chromium steel. The term signifies that the knife will not rust in a humid atmosphere and that it will resist the various acids in daily use. It does not mean, however, that the steel is absolutely rustproof. The coarser the surface finish, the more likely it is to corrode.In other words, the more finely ground or polished the surface of the blade, the more resistant to corrosion it is.

Stainless steel - special formula

Until 1965 ZWILLING J.A. HENCKELS not only produced its own steel but also did intensive research with the objective of optimizing the qualities of steel to meet the specific requirements of the cutlery industry. The Company´s special formula - containing the optimum ratios of carbon, chromium and other constituents - was developed on the basis of the experience obtained during this period and the results of current research.