Welding to 1 3/4" Thick Flange

[MtnManBob]

Hi Guys, have a project where will be welding to existing W 12x190 column. Has a 1 3/4" thick flange. Will welding require preheat?

 

[Guest102023]

Do it anyway, even if the rules don't require it. Not less than 225°F for carbon steel. Are you butt welding two ends together, or just an attachment? (Because preheating is not just for heat-affected zones.)

 

[MtnManBob]

brimstoner, will be attaching 5/16" or 3/8" thick connection angles to flange, no butt welding.

 

[metengr]

Yes, I would locally preheat to 200 deg F.

 

[MtnManBob]

Thanks metengr