MIG Wire Amperage Chart - Page 2

# Thread: MIG Wire Amperage Chart

1. ## Re: MIG Wire Amperage Chart

You're working way too hard.

I write down some common settings I like on a piece of cardboard and throw it under the door.
Faster than fiddle-farting around a second or third time - in my opinion.

"A dull pencil is more accurate than a sharp mind."
Makes more sense to me as well. A couple of settings where you have both volt and wire feed speed - or A,B,C or whatever your machine shows.

The 1 Amp per thou combined with the chart doesn't seem right either. The chart says 1/8" steel would be 200 ipm. MM252 chart according to Loui said 220 ipm. Miller welding calculator says 280-300 ipm. I have one source that says 350 ipm.
200 to 350 ipm is a pretty wide range, making it more or less useless. Maybe better if I try it myself and then write it down and make my own chart.

2. ## Re: MIG Wire Amperage Chart

Originally Posted by Pete.S.
Makes more sense to me as well. A couple of settings where you have both volt and wire feed speed - or A,B,C or whatever your machine shows.

The 1 Amp per thou combined with the chart doesn't seem right either. The chart says 1/8" steel would be 200 ipm. MM252 chart according to Loui said 220 ipm. Miller welding calculator says 280-300 ipm. I have one source that says 350 ipm.
200 to 350 ipm is a pretty wide range, making it more or less useless. Maybe better if I try it myself and then write it down and make my own chart.
Just remember that the wire feed speed is tied to the wire diameter. Faster speed for smaller wires to reach the same amps.

Another problem is assigning a multiplier to each wire.
This attempts to use a line to approximate a curve.

ADD moment.....**High school math warning** - lines are linear functions where curves are 2nd degree polynomials and higher.

Doesn't do a bad job, but it's not perfect.

3. ## Re: MIG Wire Amperage Chart

Just remember that the wire feed speed is tied to the wire diameter. Faster speed for smaller wires to reach the same amps.

Another problem is assigning a multiplier to each wire.
This attempts to use a line to approximate a curve.

ADD moment.....**High school math warning** - lines are linear functions where curves are 2nd degree polynomials and higher.

Doesn't do a bad job, but it's not perfect.
All the numbers quoted above was for .035" wire but sure another wire and it's another setting.

Yes, I've seen that curve before. Another problem is that you will enter globular transfer as you go higher on wfs and voltage.

And amperage depends on stickout and voltage depends on what gas you have too.

4. ## Re: MIG Wire Amperage Chart

**High school math warning** - lines are linear functions where curves are 2nd degree polynomials and higher.

5. ## Re: MIG Wire Amperage Chart

Originally Posted by Pete.S.
All the numbers quoted above was for .035" wire but sure another wire and it's another setting.

Yes, I've seen that curve before. Another problem is that you will enter globular transfer as you go higher on wfs and voltage.

And amperage depends on stickout and voltage depends on what gas you have too.
All very true. I have also noticed that Miller prior had listed 1.6 as the multiplier for 0.035" wire, but I see lately they've switched it to 2.0.

For 1/8" steel, they list 140-150 amps. With a 2.0 multiplier, that would be a good deal higher speed than 125 amps with a 1.6 multiplier.

I like 150 amps for 1/8" pretty often too.

6. ## Re: MIG Wire Amperage Chart

Originally Posted by shovelon
Hahaha!!

7. Master Welder
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## Re: MIG Wire Amperage Chart

ADD moment.....**High school math warning** - lines are linear functions where curves are 2nd degree polynomials and higher.
I went to redneck high school in rural US of A, farm country. We didn't have no dayem 'polynomials' anywhere. Wurntt allowed in our town.

8. WeldingWeb Foreman
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## Re: MIG Wire Amperage Chart

The Nook-u-lar Apocalypse comes (Which is possibly, but not definitively, worse than the Zombie Apocalypse), the initial flash vaporizes your door chart, and burns the markings off the knobs...………………………………..

The Internet is history. The scientists, who got us here in the first place, are gone. And school's out (not a great loss, they can't teach kids anything these days).

The government is in disarray (like that's a new thing??). And Dr. Phil is a small pile of carbon somewhere in Texas (not a great loss).

Now yer back to doin' things my way

If I was to test a guy, I'd put him in front of a machine with unlabeled knobs, and see if he has the starch to set it up to weld.

Here at the compound, we're ready for the Big One. Two tons of Beanie Weenies hidden in a deep bunker, semi load of Bud Light cached underground, and a good supply of Waylon 8 tracks for entertainment. There's been an ongoing debate on the Uranus Board of Directors...……………………..Charmin, or Best Choice. Survival is gonna be tough, but it doesn't have to be uncomfortable

9. Solderer
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## Re: MIG Wire Amperage Chart

Its one of the reasons that I don't care to weld much at work anymore. I have been welding for the last 50 years and do not like the fact that they set parameters and then lock out the machine so you can not adjust it to your liking. Basically telling me I don't know what I'm doing. l also dislike the new digital pulse square wave SKS Feronious Miller digital welders!!! Give me an old Hobart dog house analog welder and I'll weld two hairs together.

JC

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## Re: MIG Wire Amperage Chart

Originally Posted by farmersammm
The Nook-u-lar Apocalypse comes (Which is possibly, but not definitively, worse than the Zombie Apocalypse), the initial flash vaporizes your door chart, and burns the markings off the knobs...………………………………..

The Internet is history. The scientists, who got us here in the first place, are gone. And school's out (not a great loss, they can't teach kids anything these days).

The government is in disarray (like that's a new thing??). And Dr. Phil is a small pile of carbon somewhere in Texas (not a great loss).

Now yer back to doin' things my way

If I was to test a guy, I'd put him in front of a machine with unlabeled knobs, and see if he has the starch to set it up to weld.

Here at the compound, we're ready for the Big One. Two tons of Beanie Weenies hidden in a deep bunker, semi load of Bud Light cached underground, and a good supply of Waylon 8 tracks for entertainment. There's been an ongoing debate on the Uranus Board of Directors...……………………..Charmin, or Best Choice. Survival is gonna be tough, but it doesn't have to be uncomfortable
Now that's funny but oh so true. As far as testing Ive seen that done already no markings were left on anything and they would deliberately mess up the dials to see if you could figure it out on your own.

11. ## Re: MIG Wire Amperage Chart

Every construction project I’ve done in the local Navy shipyard. They send you to Seattle to take the welding tests. The welding machines all have duct tape over the dials. First part of the test is to set the welder within the wire manufacture’s specs.

12. ## Re: MIG Wire Amperage Chart

What is ipm?

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13. ## Re: MIG Wire Amperage Chart

Originally Posted by dusterdude
What is ipm?
Inch per minute. Wire feed speed.

14. WeldingWeb Foreman
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## Re: MIG Wire Amperage Chart

Or itches per minute, when you make the life changing decision to drop trou, and take a whiz in a poison ivy patch.

15. ## Re: MIG Wire Amperage Chart

The max amp numbers seem pretty low, I've welded at 480-520 amps for days on end with .045 wire without an issue, and my typical fabrication settings with .035 wire on steel down to 1/4 inch are 37 volts and 900 ipm, gives about 340 amps.

but I'm seeing that I seem to set my machine backwards, I think coming from using tapped voltage rather than infinitely variable voltage machines, i set my volts depending on the size of the weld I want, and up the wire speed until I get the bead profile I want keeping in mind that I always go for "whats fastest" including spatter, minimising clean up time is huge in the production shop.

unless i'm doing coded work then I stick to the wps, but there also still a range for parameters there so I go as high on the wire feed as i can and change the volts until it runs nice as long as its still in spec.

16. ## Re: MIG Wire Amperage Chart

Originally Posted by CEP
Every construction project I’ve done in the local Navy shipyard. They send you to Seattle to take the welding tests. The welding machines all have duct tape over the dials. First part of the test is to set the welder within the wire manufacture’s specs.
seems like a dumb way to do a weld test, use the same wire with c10 and a 20% CO2, 2% O2 blend and the settings needed are vastly different, that why we have weld procedures.

17. WeldingWeb Foreman
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## Re: MIG Wire Amperage Chart

I can kinda dig the effort but I don't pay attention to these sort of things.

18. ## Re: MIG Wire Amperage Chart

Originally Posted by ttoks
seems like a dumb way to do a weld test, use the same wire with c10 and a 20% CO2, 2% O2 blend and the settings needed are vastly different, that why we have weld procedures.
In heavy civil, and marine construction we use self shielded wire.
I’ve only been on one project where we used dual shield wire. Splicing these 10-feet in diameter by 1-inch wall pipe.

19. ## Re: MIG Wire Amperage Chart

Originally Posted by Pete.S.
Inch per minute. Wire feed speed.
Thought so,thanks pete

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