Charpy on MTRs
Charpy on MTRs
(OP)
I have SA-516-70N plate that says on the MTR it was charpy impact tested at -30F.
MDMT is -40 F.
Based on my design calculations, charpy impact testing is not required for my MDMT of -40F.
In my opinion, there should be no problem using this plate for -40 F but I'm being told that since the MTR says it was tested at -30 F, the plate is not good for -40 F. This doesn't make sense since the plate would be good for -40 F if it had no charpy test shown on the MTR.
Am I wrong?
MDMT is -40 F.
Based on my design calculations, charpy impact testing is not required for my MDMT of -40F.
In my opinion, there should be no problem using this plate for -40 F but I'm being told that since the MTR says it was tested at -30 F, the plate is not good for -40 F. This doesn't make sense since the plate would be good for -40 F if it had no charpy test shown on the MTR.
Am I wrong?





RE: Charpy on MTRs
Therefore, you would have to impact test to -40F.
RE: Charpy on MTRs
So as I said, no charpy test is required, so I don't know why the -30 F impact test on the MTR would preclude it from being used at -40.
RE: Charpy on MTRs
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Charpy on MTRs
RE: Charpy on MTRs