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# Hello, I am trying to work out w

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## Hello, I am trying to work out w

(OP)
Hello,

I am trying to work out where in ASME B31,3 I can get the minimum required impact values for charpy-v testing. I have looked in table A-1(m). my material is P10h Group 1 (25%DSS). I see the minimum temperature is -50C then impact testing is required. I have to test my welds to -60C.
so my question is

1. is there a table that will tel me the impacts value in Joules that I need to achieve at -60C for the charpy-v test to be a pass. I have found one table but for material in P 10H it only give a lateral expansion of 0.38mm but not requirements for absorption values in joules. Do I need to look in ASTM A370?

if the design temperature in -45c to + 80 do you think it makes and scene to be told to test to -60C?

### RE: Hello, I am trying to work out w

The measured test values may be the energy absorbed, the percentage shear fracture, the lateral expansion opposite
the notch, or a combination thereof. See more in sa-370

In your example the lateral expansion is required.

Regards

### RE: Hello, I am trying to work out w

(OP)
thank you very much r6155. So if -51C is the MDMT for duplex 22%Cr. where in B31.3 do I find information on what temperature to start impact testing. -50 in the transformation temperature but at what temperature do you have to preform impacts at,+20, 0, -1, -10, -25? cheers

### RE: Hello, I am trying to work out w

See General Note (6) in Table A-1M B31.3 2020

Regards

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