Hi,

How is it to combine stainless steel and ordinary steel in a construction? In "normal" air humidity, like in the UK, will the stainless steel start to rust faster?

Kind regards,

mm

 

I weld stainless nuts onto stainless threaded bar using normal everyday mig wire all the time and it sticks ok but the bolts I end up with are encased within plastic so we dont even have to protect them any more than that.
however I also weld with stainless wire if the bolts are open to elements and have accidentally left the stainless wire in while welding mild steel and that does not stick well at all.
so judging from this i would say welding stainless to mild is best done with mild steel wire then rust protected if open to elements.
hope this helps.

 

I don't have galvanic series chart handy but you should check that as there will be some galvanic current .

Also, be aware of the difference in thermal expansion of the two metals.

 

I don't have galvanic series chart handy but you should check that as there will be some galvanic current .

Also, be aware of the difference in thermal expansion of the two metals.