Maybe it's a function of my work, but that sounds like a lot of Pa.
Cross checking with units : A coin of diameter 25.4mm=0.0254m has an area of pi(0.0254m/2)^2=0.00016129m^2, and 9.81N/kg450kg/4=1103N, so that gives 1103N/(0.00016m^2)=6.819MPa. Sounds right, pascals are quite small. :)