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Home > Forums > Materials Engineers > Materials > Metal and Metallurgy engineering Forum

Charpy V assessment temperature.

Read More Threads Like This One

mdship (Structural)

8 Mar 12 12:31

I have lab test results for impact test in -20C. I'm performing a fracture assessment in 0C - don't know the actual toughness, planning to calculate it based on charpy value. Is there any way (curve, table, etc.) to estimate charpy value for different than actual test temperature?

redpicker (Materials)

8 Mar 12 12:41

The short answer is: No.

The long answer really isn't any longer. There is no way to estimate the charpy results at a temperature higher (or lower) than the temperature at which the test was performed, except to say that they should be equal to or higher (or lower) than the results observed at the test tempearture.

I like the short answer better.

rp

metengr (Materials)

8 Mar 12 12:55

Agreed. Either the notch toughness will be the same or better at higher service temperature. The easy way around this is to assume the the result at -20 deg C, and use this same value at 0 deg C. It is at least a conservative approach.

rmw (Mechanical)

8 Mar 12 21:39

Get ahold of ASTM A709 and I think you will find you answer.

rmw

brimstoner (Materials)

9 Mar 12 12:49

Concur with redpicker and metengr.

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