SA-335 P12 to SA-213 T91 Filler Metal

[eroman]

Hi All. I am going to weld a SA-213 T91 2" diameter .240" MWT tube to a boiler header SA-335 P12 13" diameter 3.5" MWT. I need to qualified a WPS and I am planning to use ER90S-B9 as the filler metal. Any recommendation about other filler metals that could be suitable for these materials?

 

[weldstan]

ER90S-B3.

 

[eroman]

ER90S-B3 is a better option? any pros and cons between those feller metals for my application?

 

[metengr]

I agree with weldstan, the ER90S-B3 would be my first choice for this dissimilar metal weld given the base materials.

 

[eroman]

Thanks guys!