Long before K110 appeared in production and custom knives, its origins were in the demanding industrial environment of cold work tooling, where resistance to abrasion, dimensional stability, and long service life mattered far more than corrosion resistance or ease of sharpening. K110 was developed by Böhler, the Austrian steelmaker founded in the nineteenth century by brothers Albert and Emil Böhler, a company that would later merge with Sweden’s Uddeholm to form Böhler-Uddeholm in 1991. K110 belongs to the family of high-carbon, high-chromium cold work tool steels commonly designated D2. Böhler identifies K110 as equivalent to DIN 1.2379 and AISI D2, placing it within one of the most widely used industrial tool steel families ever developed.

For many years, steels like K110 remained largely confined to industrial applications rather than consumer knives. The knife industry historically relied more heavily on simpler stainless steels because they were easier to machine, polish, and maintain. As the enthusiast knife market expanded during the late twentieth century, however, makers began experimenting with industrial tool steels that offered dramatically better edge retention. D2 became one of the earliest steels that caught the eyes of knife makers during the 1980s and 1990s, even before powder metallurgy steels became dominant. Since K110 is Böhler’s equivalent to D2, it naturally followed the same path into knives.

Knife makers were attracted to K110 because it could hold an aggressive working edge for a very long time under abrasive cutting conditions. Cardboard, rope, leather, and other fibrous materials that quickly dulled conventional stainless steels had far less effect on K110’s carbide-rich edge. People who prioritized edge retention often accepted the tradeoffs that came with the steel, namely lower corrosion resistance and more difficult sharpening. Even though K110 contains significant chromium, much of that chromium is tied up in carbides rather than remaining free in the steel matrix to provide stainless behavior. As a result, K110 sits within a gray area often described as semi-stainless.

The rise of CNC machining and improved heat-treatment practices helped expand K110’s presence in production knives during the early twenty-first century. European manufacturers in particular embraced Böhler steels, and K110 became common in hard-use folding knives, fixed blades, and outdoor knives produced in Central and Eastern Europe. Many knife enthusiasts appreciated that K110 offered performance characteristics close to premium steels at a more accessible cost.

K110 is an important stage in the evolution of knife steel development. It belongs to the older generation of conventionally cast high-alloy steels that preceded modern powder-metallurgy grades like CPM Cru-Wear, M390, or Böhler K390. Conventional ingot casting creates larger carbides than powder metallurgy processes, which can reduce toughness and make sharpening more difficult, but those large carbides also contribute to the aggressive wear resistance that many users still appreciate in D2-class steels. Even with newer steels available, K110 delivers proven real-world cutting performance without the extreme cost associated with many modern premium alloys.

The continued popularity of K110 also reflects the long history and influence of Böhler itself. The company spent decades refining industrial metallurgy before the knife world fully recognized the value of these steels. Böhler and Uddeholm together became two of the most influential names in specialty steel production, supplying tool steels for manufacturing industries across the world before eventually becoming part of the voestalpine group. K110 is one of the clearest examples of industrial metallurgy crossing into the enthusiast knife market, where a steel originally intended for dies and punches found a second life in folding knives, survival knives, and hard-use cutting tools carried by people far removed from the factory floor.