Charpy impact temperature
Charpy impact temperature
(OP)
Qualifying a PQR for supplemental essential variables (impacts) to Section IX & Section VIII Division 1 UG-84 for minus 20F MDMT. If the actual impacts are subsized below the 80% rule you have to incorporate an additional temperature drop for the impact tests.
That PQR is still only qualified for minus 20F, correct? Or is it qualified to the lower temperature you tested at?
That PQR is still only qualified for minus 20F, correct? Or is it qualified to the lower temperature you tested at?





RE: Charpy impact temperature
RE: Charpy impact temperature
Maximum heat input is another supplementary essential variable. When you have a multi process PQR (GTAW/SMAW for example),should the WPS have separate limits for each process?
RE: Charpy impact temperature
RE: Charpy impact temperature
What about when you have 3 PQR's to cover a certain thickness range. Should your max heat for an individual process be an average heat of all 3 PQR's? Or should it be the highest (or lowest?) heat PQR?
Or would you assign a maximum heat input to each qualified thickness range per QW-403.6?
RE: Charpy impact temperature