Im 200lbs and i deadlifted 450lbs first ever try with no training is that average?

im 5' 8" tall 90kg or just under 200lbs or 14stone it was at a highland games and lifted 205kgs (451lb) i asked for another 20kg on the bar (44lbs ) however they put 40kgs on the bar 88lbs (total539lbs or 245kg) i failed this is this an average effort from an average man?