WeldingWeb - Welding Community for pros and enthusiasts banner

Can I MIG weld with only CO2? Getting frustrated with flux core.

13K views 89 replies 31 participants last post by  Welder Dave  
Part problem is the 120 v welder.
I have fluxcore since about 1980.
The only problem I had when try the 120 v welders they did not work with or without gas.
I gave up and purchased a 240 v welder and now welds great.

Dave

I'm a newb welder and have done a few small projects with a 120v flux core welder. My biggest frustrations so far are:

  1. constantly having to wire brush the slag off the welds
  2. blowing lots of holes in thinner material. Was welding some 0.06" thick tube, and it was a nightmare. Lots of holes, then lots of time filling the holes, and of course lots of wire brushing. I could do the wire brushing with a grinder, but then it's time putting on PPE, then taking off PPE, so it's faster to wire brush by hand.
  3. this is minor, but having to step away after each weld to avoid breathing in the smoke. I could get a fan, but it's just another thing to set up.
  4. not always being able to see the puddle. Sometimes this is because of all the sparks and smoke, and sometimes it's because I have to move very quickly on thin material to avoid blowing through. My understanding is it's easier to see the puddle when mig welding. Is that true?

I find 1 and 2 lead to projects taking a *lot* longer than I'd imagined they would. I'm tempted to switch over to MIG, but the cost of entry is kind of steep for my occasional DIY use. So I'm thinking maybe get a cheap chinesium mig welder like the 205-DS. And maybe another way to keep the cost down is to stick with C02 in an aluminum cylinder? For welding steel, is there a significant difference between all C02 vs C25?
 
I agree .

I am pointing to others
The same size bottle 75 25 and the CO2 will have about 3 times the gas or the CO2 will last almost 3 times longer.

If buying for my shop it is co2 to save money.
Now if working for someone like the 75-25 for a soother welding they are paying the bill.
Dave


My tank costs here in SC at Welders Supply House are:
CO2 - $40
75 - 25 - $71
Argon 100% - $65