Hi Mandeep,
Thanks for your reply.

I was getting much different values, hence my question. I'm using ordinary carbon steel, SA-516 Gr.70 for plate. Codecalc calls up material identifier 18 (C- Mn Si, 1-1/4Cr 1/2Mo & 3Cr-1Mo) which I understand to be correct. However when comparing these coefficients to ASME II Part D they vary quite a bit. Enough to make one of my load cases fail!

I have changed the material identifier to 1 which gets values to that of ASME II Part D. As this is an ASME tubesheet design I feel more comfortable with these values.

Thanks for your help.