сварка: mill tempering temperature

[G.O.A.N.]

контекст:
Note that it has been confirmed that for the three heats where weld through thickness hardness is between 251 and 255HV (heats ####, ###, ####), this PWHT temperature is less than the mill tempering temperature.

[Mrs]

имхо:
...для трех плавок твердость по толщине сварного шва такая-то
...менее температуры отпуска (проката)