WELDING BLACK IRON PIPE

brimfield

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Lincoln arc
What is the best way to weld up Black Iron? Can brake or carb cleaner be used to get it clean enough to weld and what is the best rod for it. I weld on rare occasions just for home projects..
 

Yomax4

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Rod depends on what the application is. What ever you do, don't weld over brake-kleen. some of it is poisonous.
 

Lis2323

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I would just grind the weld area (and a spot to attach your ground clamp) shiny.
 

cwby

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Snyder TX
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Miller/Everlast
From a web search -
The chemical in the brake cleaner is Tetrachloroethylene. When this chemical is exposed with excessive heat and argon (used in MIG and TIG welding) it also produces phosgene.
Phosgene is BAD stuff.
 

Motox

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Lincoln Ranger 10,000 plus, Millermatic 141, Hypertherm Powermax 30
What is the best way to weld up Black Iron? Can brake or carb cleaner be used to get it clean enough to weld and what is the best rod for it. I weld on rare occasions just for home projects..
Not sure what you are trying to build but I would do a few test pieces. Lis2323 mentioned grinding to shiny metal and I would start with a 5P+. If that's not satisfactory talk to your local welding shop or supply store. They usually have some good suggestions.
 

Aczlan

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I would just grind the weld area (and a spot to attach your ground clamp) shiny.
That or use the wire wheel on the bench grinder to get it shiny, otherwise whatever rod you are used to should be fine. Its called iron pipe, but the pipe is actually steel, not iron (fittings may be iron though).

Aaron Z
 

Gary Fowler

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I also am not sure what you are calling black iron. A lot of cast iron drain pipe is "black iron" and wont be welded with a 6010 rod. You might get by with a 7018 if it doesnt crack after welding but a nickel based rod specifically for cast iron is what you would need to use.

Regular steel pipe (ASTM A 53/106) can be welded with any of the 60xx rods very easily. For DC welding, use the 6010 for the root pass (you can weld it all the way with these rods also) then switch to a 7018 for fill and cap. This gives you the strongest weld.
 
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