Welding 316 SS to A 182 F5

[argetlam]

Hi!

I have a question: If I want to weld 316SS to A 182 F5 (UNS K41545), what are the welding requirements (electrode, filler metal, pass temp, special heat treatments, etc) that i need to know? I heard this is possible. But I'm not really sure about it.

Your responses would be greatly appreciated.

Thanks!

 

[metengr]

argetlam;
Welding ASTM A 182 Grade F5 to 316 stainless steel in a dissimilar metal joint combination, such as the above, can be done. Grade F5 is an alloy steel containing 4-6% Cr and is weldable provided you specify preheat and post weld heat treatment. Type 316 is an austenitic stainless steel that does not require preheat or post weld heat treatment for welding. So, you will need to have a detailed weld procedure to follow because post weld heat treatment will need to be performed on only one of the base metals (the Grade 5 material) for this weld joint.

Welding requirements for various base materials are normally found in the applicable code of construction for this item. If you have no specific code of construction to fall back on, one can default to either the ASME Boiler and Pressure Vessel Code or an ASME Piping Code, depending on the specific application. Can you tell us the specific application?

The filler metal selection is a little more difficult because it is based entirely on service application (strength and temeprature) of the welded component. You have several options for filler metal - 309 or even Inconel (Ni-base) because this is a dissimilar metal weld joint.

One bit of advise, if you are unfamiliar with welding, I would strongly recommend you seek professional advice for the above. Dissimilar metal welding can require very specific welding instructions especially when you are welding a low alloy steel that is hardenable by heat treatment to an austentic stainless steel.

 

[strider6]

In this case 'll suggest a buttering on the low Cr materials with a SS 309.
So you can make your heat treatment on the buttered materials and then complete the weld.

S.

http://www.corrosionist.com

 

[strider6]

this discussion on AWS forum can give you some help.

http://www.aws.org/cgi-bin/mwf/topic_show.pl?pid=32616;hl=dissimilar#pid32616

S.

http://www.corrosionist.com