Simulations have been performed with armour piercing ammunition with a core of tungsten carbide. The ammunition is called 7.62*51 mm AP8 and the muzzle velocity is 970 m/s. The intention with the study is to determine suitable material parameters for tungsten carbide, to obtain correspondence with simulations and practical tests. Material data from the literature is shown. Experimental result from penetration in armour steel and ceramic tile with backing is available. Experimental result from oblique impact against thin steel plates is also available. The simulations show a qualitative but not quantitative correct description of the reality. Simulations of impact at right angle against armour steel show that the material data must be set much higher than the data published in the literature. It can depend on the material model inability to consider post yielding. Another possibility is that dynamic compressive strength for the projectile material is slightly higher than data in the literature. Oblique impact against thin steel plate shows that the bending stress in the projectile can be relatively high.