looking at the time temperature parameters Larsen-Miller vs Hollomon-Jaffe they both appear to be different arrangements of the same equation? is this correct?
LM = T (log tr + C)
HJ = T (C + log (t))
The recommended values of constant C range from 20-22.
For tempering some have used C = 18...
fabricator joined a P1-1 to P5a-1 and completed PWHT to 1250F, B31.1 requires 1300+ for P5a material. ANI approved 1250F at 90 minutes soak, ramp was good.
I would like to confirm that joint is stress relieved can I use harness to confirm ?
Is there a reference of what to expect what hardness...
