Dual shield wire?

[200cows]

What is my best option for trying some dual shield mig wire? .035 Mostly 1/8”-3/8” material C10 gas multi pass out of position vertical and overhead??
Is there specific dual shield wire or will any flux core wire work? Electrode positive as long as I’m using gas Right??? Thanks

[Oscar]

You cannot use C10 gas as most Gas Shielded flux-cored wires use either C25 or straight CO₂. From my testing, less than 20% CO₂ increases the probability of producing worm-tracks. It's worse on 035 than on 045.

You also cannot use just any flux-cored wire and throw in a shielding gas. The flux constituents "need" the ambient nitrogen and some oxygen I believe to prevent embrittlement of the weld bead.

Two typical classes of Gas Shielded Flux cored wire (FCAW-G) are: E70T-1 and E71T-1. The "70" is for F/H position, and the "71" is all-position. The secondary classifiers are the 1C or 1M or 1C/1M. They describe which shielding gases are typically used. 1C= 100% CO₂. 1M= C25. 1C/1M= 100% CO₂ or C25. There could be some other wire that use other gas mixtures, but for the most part they use those I listed.

[Welder Dave]

E71T-1 is the most common dual-shield used. Lincoln, Hobart, Esab and a host of others carry it.

[Louie1961]

Finding 035 gas shielded flux core in anything less than a 33 lb spool can be difficult (but not impossible). What machine do you have?

[200cows]

It will be C25 I don’t know what I was thinking. I have a new Miller multiprocess 235. How do I subscribe to this thread so that I get e mail updates?

[smithdoor]

I agree wi thg h Oscar.
I used Dual shield wire with CO2 from 1980 thg o 2004 for spec work .

Today in retirement I use just flux core E71T-11 0.030. Great for field work too.

Dave

You cannot use C10 gas as most Gas Shielded flux-cored wires use either C25 or straight CO₂. From my testing, less than 20% CO₂ increases the probability of producing worm-tracks. It's worse on 035 than on 045.

You also cannot use just any flux-cored wire and throw in a shielding gas. The flux constituents "need" the ambient nitrogen and some oxygen I believe to prevent embrittlement of the weld bead.

Two typical classes of Gas Shielded Flux cored wire (FCAW-G) are: E70T-1 and E71T-1. The "70" is for F/H position, and the "71" is all-position. The secondary classifiers are the 1C or 1M or 1C/1M. They describe which shielding gases are typically used. 1C= 100% CO₂. 1M= C25. 1C/1M= 100% CO₂ or C25. There could be some other wire that use other gas mixtures, but for the most part they use those I listed.

[Oscar]

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[123weld]

i get "lincoln 71m" in .035 on 10lb spools

[Welder Dave]

E71T-11 isn't in the same ballpark as E71T-1 Dual-Shield. It's not even apples to oranges, it's like apples to watermelons.

[MinnesotaDave]

Two typical classes of Gas Shielded Flux cored wire (FCAW-G) are: E70T-1 and E71T-1. The "70" is for F/H position, and the "71" is all-position.

Minor note, the 7 indicates 70,000 psi tensile.
The next digit, 0 is flat or horizontal, 1 is all position.

[smithdoor]

At one time in my life I was buying 5 60 pound coils of E71T-1. It a great wire for welding.

Today I use E71T-11 and only buy 10 pound roll
I found it is a great wire too and no gas.

Dave

E71T-11 isn't in the same ballpark as E71T-1 Dual-Shield. It's not even apples to oranges, it's like apples to watermelons.

[Oscar]

At one time in my life I was buying 5 60 pound coils of E71T-1. It a great wire for welding.

Today I use E71T-11 and only buy 10 pound roll
I found it is a great wire too and no gas.

Dave

That's great Dave , but you already said that in post #6

[Welder Dave]

E71T-1 is approved for structural welding and pressure welding requiring low temp. impact strength similar to 7018. E71T-11 is self-shielded, so good for outdoors but as far strength would be more inline with 6013. Not really approved for anything other than general light duty welding.

[farmersammm]

Finding 035 gas shielded flux core in anything less than a 33 lb spool can be difficult (but not impossible). What machine do you have?

https://www.weldingoutfitter.com/pro...ire-10lb-spool Might not be common in your neck of the woods?????

[farmersammm]

I positively crap when they tell me what a spool of wire costs...............then I remember that stick is about the most inefficient transfer method there is.

[farmersammm]

I know this is off topic, but I'm getting ready to do some welding. Haven't struck an arc in maybe months, or possibly less. But................I'm nervous as Hell. I'm afraid I can't do the thang anymore, or do it as well as I used to. Gettin' old ya know.

[smithdoor]

With luck no one else will notice that dup.

Dave

That's great Dave , but you already said that in post #6

[Oscar]

https://www.weldingoutfitter.com/pro...ire-10lb-spool Might not be common in your neck of the woods?????

I think he typed the opposite of he might have wanted to say, perhaps? Just a hunch though. Ive found, its the 035 33lb spools are not as easy to find. Amy aka Welding Queen aka Blue Demon has it, you just have to ask.

[Louie1961]

I positively crap when they tell me what a spool of wire costs...............then I remember that stick is about the most inefficient transfer method there is.

035 dual shield seems to be more expensive per pound than the 045. and smaller spools exacerbate that. The only place I knew of that sold the 10 lb spools of 71M was weldingsupply.com, and it is nearly $5/lb, as opposed to larger spools which get down to a little more than $3/lb, which is awfully close to the price per lb for 50 lbs of 1/8 Excalibur 7018 rods, and almost exactly the same price as Superarc L56 mig hardwire. Considering that 71M is easier for me to run vertical or overhead than any other process, and price-wise its pretty close, I would go with 71M over stick welding any day.

[smithdoor]

If you working on a contract/quote speed to save labor. To save on cost of wire buy a few hundred pounds at time (about 300 pounds)

Welding rod has more clean up over flux core wire.

Dave

035 dual shield seems to be more expensive per pound than the 045. and smaller spools exacerbate that. The only place I knew of that sold the 10 lb spools of 71M was weldingsupply.com, and it is nearly $5/lb, as opposed to larger spools which get down to a little more than $3/lb, which is awfully close to the price per lb for 50 lbs of 1/8 Excalibur 7018 rods, and almost exactly the same price as Superarc L56 mig hardwire. Considering that 71M is easier for me to run vertical or overhead than any other process, and price-wise its pretty close, I would go with 71M over stick welding any day.