Stress Ratio & Impact testing

[Corgas]

Colleagues,

After calculating stress ratio according to ASME B31.3 (2008 edt) Fig. 323.2.2B, General note (a)(1), number is well below 0.3 (it doesn't intersect curve). What reduction in minimum design temperature can I use?

Thanks in advance.

Corgas

 

[StevenHPerry]

See table 323.2.2 and read all of the notes on the next page, especially note 3.

I don't think you need to use figure 323.2.2(b) for anything but the definition of what the stress ratio is.

- Steve Perry

http://www.linkedin.com/in/stevenhperry

This post is designed to provide accurate and authoritative information in regard to the subject matter covered. It is offered with the understanding that the author is not engaged in rendering engineering or other professional service. If you need help, get help, and PAY FOR IT.

 

[SNORGY]

For carbon steels, I think you impact test below -55 F (-48 C) irrespective of stress ratio.

I would, anyway.