ASSAB XF-25 Carbide Assab Assab XF-25 tungsten steel XF-25 size: ultrafine particles 0.6-0.8 (um) Cobalt content: 15 (%) Density: 14 (g/cm3) Hardness: 90.5 ( HRA) Flexural strength: 400 (kg/mm2) Applications: 1. leadframe, EI sheet 2. nozzles, pumping line mode 3. cutter 4. powder molding 5. continuous die. Periodic table of the hardening phase is the transition metal carbides, such as tungsten carbide, titanium carbide, tantalum, their high hardness, melting point above 2000 ℃, and some even more than 4000 ℃. In addition, transition metal nitrides, borides, silicides have similar characteristics, but also can act in the cemented carbide hardening phase. Determine the presence of the hardening phase of the alloy with high hardness and wear resistance.