4.2.4 Hot bending
a) In the case of hot bending, all arrangements are to be
made to permit careful checking of the metal temperature
and to prevent rapid cooling, especially for alloy
steels.
b) Hot bending is to be generally carried out in the temperature
range 850°C-1000°C for all steel grades; however,
a decreased temperature down to 750°C may be
accepted during the forming process