Jonalloy is a stellite like cast cobalt-chrome-tungsten alloy (Co-Cr-w), a so-called cobalt superalloy. It bridges the gap between HS (high speed steel) and HW (carbide). The material composition and casting process have been developed and optimised in-house, resulting in a high quality product.
The microstructure consists of a very fine dendritic network of eutectic carbides in a cobalt-rich matrix, which gives Jonalloy its unique properties. The fine grain structure results in a high hardness and very good impact resistance. Jonalloy’s mechanical and physical properties make it especially recommended and widely used for:

  • Cutting of most solid woods (soft and medium, except exotics).
  • Cutting of metals, especially Stainless Steel.
  • Cutting edge of surgical scissors and knives.
  • Wear parts.


  • Wear resistant
  • High hardness (60 HRC)
  • Heat resistant (little hardness loss up to 814°C/1497°F)
  • Non-magnetic
  • Very good corrosion resistance
  • Low coefficient of friction
  • Good impact and shock resistance


Jonalloy finds applications in wood working; cutting of plastics, synthetic materials, paper and cardboard; and the medical and chemical industries, due to Jonalloy’s high corrosion resistance and bio-compatibility. As a material it is mainly used for the production of cutting tools and wear parts.


HRC 60
Co 44 - 48 %
Cr 28 - 32 %
W 13 - 17 %
Nb 3 - 5 %
C 1 - 5 %
Fe 1.5 - 4 %
Mn 0.5 - 2 %
B 0.1 - 0.6 %
Stellite Jonalloy
Stellite Jonalloy