Temperature T , in °C factor A factor B , in MPa 40 0.00001 0.841 40 0.00124 103 40 0.002 109 40 0.004 119 40 0.01 132 40 0.025 143 205 0.00001 0.841 205 0.00107 89.6 205 0.002 102 205 0.003 108 205 0.004 113 205 0.01 124 205 0.03 134 205 0.06 140 345 0.00001 0.772 345 0.000892 67.7 345 0.002 82 345 0.004 95.1 345 0.006 101 345 0.008 105 345 0.01 107 345 0.02 112 345 0.04 117