Stainless Steel Grades Directory

AUS-8 is a Japanese high-quality stainless steel from the manufacturer Aichi Steel, which is used for the production of knives, particularly folding, kitchen, and hunting knives. It is valued for its high corrosion resistance thanks to its chromium content, good hardness and toughness (57-59 HRC), and ease of sharpening. The steel has a balanced price-quality ratio and is suitable for everyday use.

Details: Written by: ukirs; Published: 02 October 2025; Created: 02 October 2025; Last Updated: 02 October 2025; Hits: 67

CPM D2 is a powdered version of the traditional D2 tool steel, manufactured using the Crucible Particle Metallurgy (CPM) technology by Crucible Industries. Compared to conventional D2, CPM D2 steel has improved strength, toughness, wear resistance, and better edge retention, along with better grindability (it is easier to grind).

Details: Written by: ukirs; Published: 05 October 2025; Created: 05 October 2025; Last Updated: 06 October 2025; Hits: 76

Nitro-V is a high-carbon stainless steel with added nitrogen and vanadium. Vanadium has long been considered a key alloying element for heavily worked steels, from simple tool steels to aerospace components. By increasing grain refinement and promoting carbide formation, it becomes easier to retain and maintain an edge, whether on a razor, a luxury kitchen knife, or a tactical folder.

Details: Written by: ukirs; Published: 06 October 2025; Created: 06 October 2025; Last Updated: 06 October 2025; Hits: 75

PMD550 is a high-tech powder stainless steel from the German concern DOERRENBERG, designed for the production of high-performance knives and tooling due to its excellent cutting ability and wear resistance. The steel contains a high percentage of carbon (2.6%), chromium (17%), vanadium (3.3%), and cobalt (2%), ensuring high hardness (over 63 HRC), abrasive wear resistance, and good impact toughness.

Details: Written by: ukirs; Published: 09 October 2025; Created: 09 October 2025; Last Updated: 10 October 2025; Hits: 59

CPM SPY27 is a high-tech powdered stainless steel that occupies a special place in the world of knives. It is the result of a unique collaboration between the knife company Spyderco and the manufacturer of metallurgical powders Crucible Industries (USA). This steel was developed exclusively for use in the production of Spyderco blades and is not sold to other knife manufacturers.