Welding Stainless Steel to Maintain Corrosion Resistance

[vanci]

What is the history behind limiting heat input to 60kJ/in the welding of stainless steel (TP 304) to prevent sensitization/ maintain corrosion resistance in the as welded condition? Is it related to grain growth or ferrite?

Thank you in advance.

 

[MikeHalloran]

Browse Special Metals, Outokumpu, and Allegheny Ludlum's websites. There's a ton of stuff out there.



Mike Halloran
Pembroke Pines, FL, USA

 

[metengr]

The heat input is limited to reduce sensitization affects, which results in reduced corrosion resistance.

 

[EdStainless]

Along with this remember that you need excellent gas coverage and an overalloyed filler.

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Plymouth Tube

 

[btrueblood]

Reduced carbon (e.g. 304L) helps too.