After many attempts we have finally been able to qualify our super duplex welding procedure with the G48 Method A at 40 degrees C. As part of our welder qualification process we are also requiring each welder to pass a G48 test. This has proved to be a bit problematic in that we have had several welder qualification fail the G48 even though they are welding inside the parameters of the weld procedure. This is a multiple pass manual weld (.375" wall). Our acceptance criteria is <4.0 g/m2 with no pitting on the test faces. We are considering changeing the test temperature to 35 degrees but we need to justify making this change to our specification. Any information that can help quantify the difference in testing temperatures (35 vs 40 degrees) would be appreciated.
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