Dear all,
if I have an ASME IX PQR qualified welding a P-No.1 material with a 3 mm root made of inconel 625 by weld overlay to a P-No.10H material (BW full penetration) am I allowed to write a WPS for a partial penetration joint P-No.1 to P-No.10H without inconel 625 root on the carbon steel...