Mig welding fillet welds: mill scale vs clean

Рет қаралды 1,622

Күн бұрын

In this episode we tackle testing the differences between welding a single pass fillet weld on mill scale vs cleaned material.
0:00:00 Intro
0:03:02 Lets weld
0:06:23 The results
0:08:15 Conclusion

Пікірлер: 17

@sebastianleicht 10 ай бұрын

Good evening, that was even impressive as previous Video! Thank you!

@jake-mv5oi 10 ай бұрын

Had to weld a 1/2" thick full hydro bracket to a tie rod made from two 1/4" thick tubes sleeved together with my titanium 125 flux welder and a map pro torch this spring. Ran about 10 passes on each side. Held better than the dinky PSC clamp it came with that had the bolts all shear in half. Pre-heating helped a lot. Super impressed with the little HF machine.

@makingmistakeswithgreg 10 ай бұрын

Sounds like you’re into building off road stuff just like me 😀. A preheat and flux core wire will weld thick plate no problem. The difference between short arc and flux core penetration on 3/8th plate is pretty crazy, I tested this in a video that will be out in a few days. Keep up the solid welds, and building off road stuff 😀.

@Justforfun-ek7et 10 ай бұрын

You’re the man! I need more money for more metal to mess around with so I watch your videos so I’m ready to go when I get my hands on some scraps!

@makingmistakeswithgreg 10 ай бұрын

With more knowledge you will get more out of your practice, so watching videos isn’t a bad thing while you wait to get materials 😀

@mkearn724 10 ай бұрын

Nice comparison Greg. When I used to work in a fab shop my eyes were opened to mig with mill scale. I used to have to make hundreds of the same part which was 1/8” mild steel and for speed I would downhill a good bit of the time until I realized that some of the time I wasn’t even burning through the mill scale. The welds looked slick as hell but they weren’t holding a damn thing. Downhill is know to burn in less then the millscale just made it worse.

@makingmistakeswithgreg 10 ай бұрын

When I get around to doing downhill I bet that will be a huge deal with scale lol. What you described is exactly what I have seen. A long time ago I ran some downhill MiG welds on a 1/4in steel tie down/chain pocket on a side of a trailer. I hit it with a hammer to bend it a bit straighter and it broke off like I didn’t even weld it lol. The weld actually didn’t look that bad overall, vertical down is definitely not the way to go lol.

@ls2005019227 10 ай бұрын

Another great test & info- Thanks!

@IT_Dinosaur 10 ай бұрын

Good info as always.

@makingmistakeswithgreg 10 ай бұрын

Thanks 😀

@hhoverdrive1 10 ай бұрын

That was a pretty surprising result. I’m curious what my titanium 125 meg welder would do. I only use flux core wire and I weld on quarter inch stuff regularly. But I go in a C pattern welding. I wonder how much of a difference that would make when you move around versus a straight line weld.

@makingmistakeswithgreg 10 ай бұрын

So I have tested that and a video will be out soon 😀. Flux core wire has much more penetration than gas shielded mig. However you want to be cautious on “riding the puddle” or carrying too much metal. In the video where I attempt 3/8th plate the difference between straight in stringer bead and a circle e type movement at the same (about 170 amps) output was night and day. The bigger the molten pool is generally the worse the penetration is with wire processes, you want that wire hitting the root so it’s biting in. On second and 3rd passes making weaves/circle e/wider welds isn’t a issue, since you need fill and not root fusion. Edit: I did actually test the titanium 125 on 1/4in steel in a video a while back. It did have adequate penetration to safely weld 1/4in. The first pass should be done straight in and subsequent passes could be weaved. The machine can’t put down enough metal in a single pass to get penetration and enough weld to equal the thickness of the base material.

@jimmywilson1388 10 ай бұрын

That’s crazy, I figured the mill scale side would have been horrible…

@makingmistakeswithgreg 10 ай бұрын

I thought so too. I was expecting far more significant results. I have been doing weld break tests and that has proven to be far more interesting and different lol.