Hi,
I notice in Codecalc that the program selects the material property identifier automatically from the user material selected. I am running a fixed ASME tubesheet design and so it is very important that I get correct values for my coefficients of thermal expansion. It appears as though Codecalc is using TEMA to obtain the coefficients.

As this is an ASME design, should the coefficients not come from ASME II Part D? I get different values from Codecalc when using ASME and am inclined to go this route, changing the identifier so I get values from ASME.

Any comments would be appreciated. Thanks
ps: great forum!

Hello Alan,

The program uses values from both TEMA and ASME. Now, ASME is providing more and more values, so we are changing to ASME values. Btw, if you look in the reference of the TEMA values they list ASME as one of the sources along with user materials.

In the ASME tubesheet module you can overwrite the program E and alpha values with your own values. Go to Tubesheet tab, click on the button next to the type of tubesheet and then you can enter it there.

You can also edit the identifier to use a different one.

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.