Reduced impact test temperature
Reduced impact test temperature
(OP)
We have tested a piece of SA350 LF2 with specimen thickness of 3 mm at -40°. Now Both ASME VIII-1 and B31.3 say that our minimum design temperature should be 22.2°C higher.(-40°-22.2°= -17.8°C). In other words for a min. design temperature of -40° we should have been testing at -62.2° (-40°C minus 22.2°C).What is the reason for this reduction. It seem to me that a test specimen of 3 mm absorbs less energie than a test specimen of 10 mm at the same temperature. So when a the smaller specimen has acceptable value's a thicker also will be acceptable.
Please advise
Please advise





RE: Reduced impact test temperature
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Reduced impact test temperature