@0707 Cooling rate is 100 degrees per hour as well. Max hardness is at welding seam of value 240Mpa, base metal hardness is 198Mpa.HBR values. While cooling it was covered with blanket until 200 degrees C then it was removed.
@weldstan and @r6155 are you guys able to show me the section which...
I am currently working on a new PQR for P22 and A106B welding. I am using a A335 P22 pipe on one side and A106B pipe on the other. Pipe size is 3" sch80. I have done an X-ray before and after the PWHT process and there was no visible defects. My PWHT procedure is as follows, preheat till 230...
