Welding of disimilar materials A182 F11 to LCC

[Pegasus2]

I need to know if I can weld A182 Gr. F11 pipe (p-4 material group) to a LCC valve body (p-1 Material group). Would it be better to weld two similar materials? i.e. a Cr-Mo valve body to the A182?

Your input would be very much appreciated.

 

[metengr]

Yes, you can directly weld these material combinations, safe ending is not required. The filler metal can be either an E70xx (carbon steel) or an E80xx B2 (1.25Cr-1/2Mo) to match either the carbon steel or i.25Cr- 1/2Mo base material, respectively.

Don't forget to use preheat requirements for the F11 pipe base material and, if required, follow the post weld heat treatment requirements for the F11.

 

[GRoberts]

I'm curious what the application is. Why are you welding a material for high temperature applications (P11) to a material for low temperature applicaions (LCC). I sometimes see Cr-Mo pipe welded to WCC/WCB castings, but not LCC/LCB.

 

[Pegasus2]

Thanks guys. I was in error when I said LCC, It was supposed to be WCB material. Max. design temp is 315°C.

I am interested in learning more about welding, are there any good books (other than standards) one can purchase.

Thanks again.

 

[metengr]

Pegasus2;
Here you go, and enjoy;

http://www.khake.com/page89.html

 

[Pegasus2]

Thanks metengr, I'm pretty sure I'll be busy for the next little while.

Thanks Again