W18Cr4V of tungsten high speed steel, high hardness, red hardness and hot hardness. The wide range quenching heat treatment is not easy to overheat, oxidation and decarbonization heat treatment process is not easy, better grinding performance. The steel at 500 ℃ and 600 ℃, the hardness HRC57 ~ 58, respectively, and maintained at HRC52 ~ 53, for a lot of general work materials have good machinability.

Chemical composition:
Carbon content of 0.7 - 0.8%,
The amount of tungsten 17.5 - 19%,
Chromium content 3.80 - 4.4%,
Vanadium content 1.0 - 1.4%,
Silicon content is less than 0.4%
Manganese content of less than 0.4%,
Molybdenum content is less than 0.3%.
Cutting temperature 540 degrees, can maintain HRC66 hardness
Cutting temperature 600 degrees, the hardness can be maintained HRC63
Advantages: versatility, process maturity.
Cutting speed: 80 m / s (600 degrees Celsius).
Uses: complex shape of small tools.