What rod size can i use for 4mm metal

[BurnBern]

I need some help i have a stick welder that i purchased 3 years ago for a offset smoker. But i am now building a mini GF. For the mini I’m using 4mm plate and tubing. I’m struggling with rod size as I’ve tried 2.5mm 7018 rods. The setting for them are 90-120 but it keeps burning through. If i go lower than 90 the rod just sticks.

What rod can i use or what did you guys use. I don’t want to go and get a mig as i only occasionally weld.

[Dirtytires]

No experience with a stick....sure someone will be along soon that can help tho.

[Big T]

4mm is pretty thin for your average welder using a stick machine. You could try a 1/16'' or 3/32'' rod. A 1/16'' rod can be ran between 20-40 amps so that'll probably be your best option. You'll still have to make a lot of small welds or risk blowout or warping so be very patient and don't get in a big hurry. I'm not a welder by trade so someone else may come along that can tell you exactly what you need.

[towtruck]

90-120 is waaaaaaaay too hot for that size rod. I run 110-115 with 1/8" rod on 1/4" plate. Play around with some scraps and just try and make small beads first.

[Diggerg]

I run 2.5 6013 at about 50-55. I'm doing 2mm plate and get the odd burn through. 7018 are high tensile rods. Not used them personally but you should be able to run a2.5 at about 60 easily.
I run 3.2 at about 90-95

[AndrewPalmer71]

Diggerg has the best advice. 6013 is a sheet metal rod. Run it in 3/32, or 1/16 if you can find em. Skip weld. You’ll be fine. Good luck!


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[jose-da-weldr]

I have been using 3/32 6010 rod on really thin sq tube, that's what I currently have on my rig. Anyways, I set mine at 50-55 Amps and whip it back and forth and you get a nice weld. I do occasionally burn through, but when i do, i fill the hole back up, and run a grinder on the weld. I take about half of the weld out and then re-weld it. It looks really good after that.

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[Enrgizerbunny]

He's running a 3.2/32" rod on slightly thicker than 5/32" plate for anyone who wants to know how it looks converted.