Temperature T , in °C factor A factor B , in MPa 40 0.0000184 1.72 40 0.000605 57.9 40 0.0015 76.5 40 0.002 80.7 40 0.0025 84.1 40 0.003 86.9 40 0.004 89.6 40 0.005 91.7 40 0.007 93.8 40 0.01 96.5 40 0.02 101 40 0.0726 108 40 0.1 108 205 0.0000199 1.72 205 0.000585 51.7 205 0.001 60 205 0.0015 66.9 205 0.002 71.7 205 0.003 77.2 205 0.004 80.7 205 0.005 82.7 205 0.006 84.1 205 0.01 87.6 205 0.0574 98.6 205 0.1 98.6 370 0.0000218 1.72 370 0.000533 43.1 370 0.0007 48.3 370 0.001 53.8 370 0.003 68.9 370 0.004 72.4 370 0.01 78.6 370 0.05 87.6 370 0.0592 88.9 370 0.1 88.9 480 0.0000228 1.72 480 0.00051 39 480 0.0006 42.1 480 0.001 49.6 480 0.003 62.4 480 0.004 64.8 480 0.01 71 480 0.0522 80.7 480 0.1 80.7 650 0.0000247 1.72 650 0.00046 32.1 650 0.001 41.4 650 0.002 49.6 650 0.003 53.8 650 0.004 56.5 650 0.005 57.9 650 0.01 61.7 650 0.07 68.9 650 0.1 68.9 815 0.0001 6.2 815 0.00016 10 815 0.000395 24.6 815 0.00145 29.3 815 0.00254 31 815 0.00562 33.2 815 0.035 37.6 815 0.1 37.6