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Posted by Rob on August 14, 2008, 9:55 pm
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I am planning to weld a heavy frame using "I" beams (size W12 X 31).
Wondering if it can be welded with regular 0.35 mig welding wire or should I
be sticking to (no pun intended) rods like 7018. Any help would be
appreciated.
Thank you
Rob
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Posted by Martin H. Eastburn on August 14, 2008, 11:17 pm
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Rob - I'm not a welder, just weld. Ernie is your man on this one.
I think you should say that the I beams are in this or that position
and how you intend to weld them. e.g. flats to flats - double stack
or end to end or on a 90 from on one end......
I'm sure there are lots of inputs on this. Is it to be overhead,
and is it a compression load (pushing on the ends) or coming from the
top or bottom...
Hate to thunderstorm on your picnic but it would be best to say upfront.
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
Rob wrote:
> I am planning to weld a heavy frame using "I" beams (size W12 X 31).
> Wondering if it can be welded with regular 0.35 mig welding wire or should I
> be sticking to (no pun intended) rods like 7018. Any help would be
> appreciated.
> Thank you
> Rob
>
>
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Posted by Grant Erwin on August 15, 2008, 12:56 am
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Rob wrote:
> I am planning to weld a heavy frame using "I" beams (size W12 X 31).
> Wondering if it can be welded with regular 0.35 mig welding wire or should I
> be sticking to (no pun intended) rods like 7018. Any help would be
> appreciated.
I would without a doubt stick weld it with large electrodes and using high
amperage. I'd probably borrow or rent a big machine that can run 300A all
day at 100% duty cycle.
You can certainly weld that stuff with wirefeed but to my knowledge it should
be done with dualshield, and with heavy wire at that. And not with some little
MIG machine, either, it takes a large beast to weld stuff like that.
If I had to do that job I'd go buy some Excalibur 5/32" rod and weld it up
with that stuff. That is the sweetest running 7018 rod I've ever used, certainly
not the cheapest though.
As the other poster said, a lot also depends on what kind of welds. If you're
just going to cope 45s and weld up a box frame then sure, stick welds. If you
are doing anything with plate being welded to the flat flange, you might
consider burning some holes and plug welding with a big dualshield machine.
Grant
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Posted by Ernie Leimkuhler on August 15, 2008, 1:38 am
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> I am planning to weld a heavy frame using "I" beams (size W12 X 31).
> Wondering if it can be welded with regular 0.35 mig welding wire or should I
> be sticking to (no pun intended) rods like 7018. Any help would be
> appreciated.
> Thank you
> Rob
>
>
MIG (GMAW) is just as Low Hydrogen as 7018 stick .
0.035" wire is a bit small for I-beams.
I would go to a 0.045" solid wire or even better a 0.045" Dual-Shield
wire (E71T-1).
My favorite dual shield is ESAB 7100 Ultra.
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Posted by SteveB on August 15, 2008, 10:52 pm
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>I am planning to weld a heavy frame using "I" beams (size W12 X 31).
>Wondering if it can be welded with regular 0.35 mig welding wire or should
>I be sticking to (no pun intended) rods like 7018. Any help would be
>appreciated.
> Thank you
> Rob
My experience would tell me to do it in 7018. That is the way that I would
be most confident. Do it in the way you are most confident of getting a
sound weld. This is heavy stuff that has to be right.
Steve
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> Wondering if it can be welded with regular 0.35 mig welding wire or should I
> be sticking to (no pun intended) rods like 7018. Any help would be
> appreciated.
> Thank you
> Rob
>
>