The material is 12Cr1MoVG; two modifications on the cover surface and one modification – does this meet the PQR requirements?
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The material is 12Cr1MoVG. According to the requirements of 47014, impact tests are required as part of the PQR process; the cover layer for PQR is supposed to be welded twice. In practice, however, only one weld was performed. Is this approach in line with the requirements?
Changes in the number of weld passes are not important factors in welding procedure qualification; as for the need for impact tests, the key is to determine whether the heat input parameters meet the requirements of the procedure qualification.
Changes in the number of weld passes are not important factors in welding procedure qualification; as for the need for impact tests, the key is to determine whether the heat input parameters meet the requirements of the procedure qualification.
Changing from multiple tracks per side to a single track per side is an important additional modification. . If heat treatment at a temperature higher than the upper transformation temperature or austenite solution treatment is applied, it is a non-significant variable. . . Note the specific meanings of multi-channel, single-channel, and single track for each side. .