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Mig welding 3/4 mild steel

Posted: Wed Sep 19, 2018 6:37 am
by Hathaway
New to the site. Been welded large engine mounts for years with 5/8 and 3/4 mild steel
Miller 252 .045 wire 75/25 set at full 29.5 and 375 wire speed
Read a post from Jody about less splatter with 90/10. So I have now switched
It seams I may have gone from arc to spray? I am trying to get it dialed in
Any help would be appreciated
My previous welds were very nice but a lot of splatter with a lot of clean up
Mounts are then powder coated shiny white. Trying to save time on clean up and they need to be strong.

Re: Mig welding 3/4 mild steel

Posted: Wed Sep 19, 2018 10:10 pm
by weldin mike 27
In applications like that in Australia, we use a tri mix gas with a bit of oxygen in it. You can get it down to a absolutely beautiful spray with not a dot of spatter. Of your parts are clean before hand (shot blasted) you can even go to an S4 wire which runs even smoother. I can't tell you exactly the settings, as we just cranked it up and go for it.