I got a reply from them.
For Young´s modulus, Poission Ratio and Density you can use the same values as for any steel (The variation is so little that it makes almost no difference in your calculations).
Hardox is made mainly for abrasive applications and not as a structural steel. Therefore we do not measure yield strength, tensile strength, impact toughness (with some exceptions) and elongation. The hardness (Brinell HBW) though is the main target and is always measured (and proved). Since it is not a structural steel, we do not have SN-curves either.
However in our data sheets you find typical values for yield strength and impact toughness. You can also convert the hardness to estimated tensile strength (approx. Tensile strength [MPa]= 3,5xhardness value [HWB])"
Just leaving it here for the seekers..