HB-3 is a go-to material for a wide range of wear parts and demanding machining applications. With a 6% cobalt binder and hardness of 93 HRA, this submicron, C2 grade is an ideal choice for cutting tools where an up-sharp edge is required. These include drills and reamers, form tools, end mills, and other solid carbide cutters for stainless steels, polymers, graphite, and carbon fiber composites, as well as non-ferrous alloys like aluminum and copper.
With an extremely homogenous microstructure and uniform grain distribution, HB-3 also an excellent substrate for CVD diamond coatings, which further enhance edge longevity while allowing for increased cutting speeds. Additionally, it provides unmatched performance for wear parts like sand blasting nozzles and wire guides.
Co (%): | 6 |
Grain Structure: | Submicron |
ISO Code: | K05-K10 |
US Industry Designation: | C3 |
WC (%): | 94 |
Density (g/cm3): | 14.9 |
Avg Grain Size (Micron): | 0.8 |
Hardness Rockwell A (HRA): | 93.00 |
Sinter HIP TRS (psi): | 520,000 |
Wear & Toughness Scale: | ![]() |