Almost 40 years ago I managed a materials lab and was involved in the failure analysis that we did. One investigation to settle a lawsuit was to determine the cause of severe pitting corrosion on a custom-fabricated electroplating tank about as big as your garage - talk about expensive. There was extensive pitting all over the tank so severe that there were fluid leaks. It turned out that someone in the fab shops had cleaned up the stainless welds with an angle grinder which had previously been used on carbon steel. Every spark which landed on the surface of the stainless tank was a source of the point corrosion. Never let stainless and carbon steel mix!

@m4rvinmartian

5 күн бұрын

Dude, I'm going to have to see that report. What you are describing is inferior foreign steel having contamination that isn't exposed until the surface is altered at high temp. OR microscopic pieces of steel (sparks) bonded to the surface at high temp, converting the spot it landed on into martensite but you're not going to convert more than microns of steel at a time. But you're not going to make SS rust just from "touching" something else. That's not how physics works on this planet. A chemical or atomic reaction needs to occur.

@m4rvinmartian

5 күн бұрын

Yeah, I just triple-checked. Your memory is failing you. You cannot diffuse carbon into the SS at room temps. What you are describing is the creation of martenistic spots on the SS, which temporarily diffused carbon into the SS at high temp since it was a oxygen/metal spark. AND THEN... likely caused a galvanic reaction with the liquids involved. But it had nothing to do with "carbon steel" and SS interacting from simple touch.

@austinhargett5792

5 күн бұрын

You betcha ❤

@treatch3

22 сағат бұрын

@@m4rvinmartian I think we are in violent agreement. The failure mechanism is the case I referred to was electro-galvanic corrosion, everywhere that specks of carbon steel flew off the grinder wheel and stuck to the tank wall.

boy, that respirator sure disappeared fast. 😂

@austinhargett5792

5 күн бұрын

Heh heh 😅

@kennethmays6830

5 күн бұрын

Go troll somewhere else. This guy is taking time out of his day to show people who are INTERESTED in learning something. You should say Thank You and move on.

@raptor2248

4 күн бұрын

@@kennethmays6830 welding stainless steel with gmaw is highly dangerous and should only be done with a proper respirator and coveralls to protect from harmful fumes and dust

308lsi with 98/2. You'll love it over the tri mix and 308l

Great vid Man. Thank you for taking the time. I’ve been a machinist as my trade for 46 years. Along the way of course I picked up welding. Nice shop you have there. I just can’t see well enough to weld like I once could. Thank you.

@Welddotcom

4 күн бұрын

Glad it was helpful! They make all kinds of "cheater" lenses that you can clip into your hood if you are having a hard time seeing.

Excellent video, thank you. I have been learning to TIG weld stainless steel, but I have MIG welded it with 95% argon and 5% CO2.

With the gas, i had someone who used c25 and the weld ended up with a very hard black coating, which i suspect is carbide. You need low amount of co2 in the gas for stainless. Eg 2%co2 98%argon.

@austinhargett5792

5 күн бұрын

C2 gas is a good option too

@Welddotcom

4 күн бұрын

Great info

Use post flow to keep the end of the weld from getting black eyes... Those black eyes will never clean up with passivation.

I would suggest using a 300 series with low carbon with high silicon added. You must adjust your inductance to a higher percentage. Keep a short stick out measure from the contact tip, not the nozzle. Dragging the arc seems to work the best to reduce spatter. The tri mix works the best but Argon/. 2 Co2 can work on thinner gauge Stainless. 😎👨‍🏭.

@Welddotcom

4 күн бұрын

All things we will have to test out, thanks for the recommendations!

Proud of you man!

Ive only MIG'd stainless once at work. 75/25 felt weird. I ended up using 98/2 based on the advice of my supervisor and a couple other welders who had done it before. Where was this video about a year ago?

You can just run 98 Argon 2 Oxy as well. Personally I'm not a big fan of just pissing away helium for practice or because the gas company made their own special blend. Helium once released leaves the atmosphere and it's not easy to make. We are all chipping away at the same finite supply

When I weld MIG, Stainless in use CRONIGON® S2 ( AR/ O² % ) Must of what it was heavy wall :)

Pulse mig stainless is great. Can still get a pretty rose and straw color. But short circuit sucks haha

@austinhargett5792

5 күн бұрын

Agreed!

@Welddotcom

4 күн бұрын

We will have to do some experimenting with pulse soon

@DanielMurphy-kq2ri

3 күн бұрын

I pulse mig stainless all the time and with the right machine it can look pretty comparable to tig. Lincoln, miller and fronius all have welders that can produce tig like appearance with pulse mig.

Cool video. Can you use pure argon for mig stainless? Also, do you have to use a different liner so as not to contaminate the wire feed?

Best gas choice for the money is 98/2. And that is the gas 8:59 recommended by Everlast in the manual and on the unit. Also manipulating inductance will clean that spatter up. you were down at 22 percent. It should be around 80. Tri mix is too expensive to run.

@sraz12

4 күн бұрын

CRONIGON® S2 AR/O² % ?

@marklugo6002

4 күн бұрын

@@sraz12 No Ar/CO2 98/2

dont forget yall if you use sharpie on stainless steel it can remove the rust resistants

Also using a tapered 7/16 nozzle helps with gas coverage. An uses less cfh.... Your regular isnt for helium so the reading off

I may not be able to "Play" in the shop anymore but sure is nice to keep a idea going. I did notice that because of this heat when welding stainless, the metal distorts or bends more when doing a continuous weld. Nothing the shrinker stretcher tools or other means can not fix as in say body shop type situations

@Welddotcom

4 күн бұрын

Stainless does tend to distort a bit more than carbon so nice to have ways to fix it around.

Would cleaning up the joint carefully before welding, as you would with TIG, have made much difference with the MIG process you were demonstrating?

@austinhargett5792

5 күн бұрын

The material was already clean. Shouldn’t need much prep. Should’ve used some anti spatter for sure

how did you keep the metal from warping?

God job💪💪💯💯👍

I have to disagree with your “not as pretty” comment. Once you dial in your settings, learn to pull with a whip you will produce beautiful beads w/ minimal spatter when anti-spatter is used. I mig 304 stainless everyday ranging from 14g-1/2”. Been welding for 30 yrs now and 10 on stainless. Also to save some money you can use a 98/2 argon/co2. It’s not as smooth as tri-mix, but it’s real close. If ya want some tips n tricks n pics, give me a holler (yes I’m old 😂)

@ypaulbrown

4 күн бұрын

dustandietz, for welding on thicker material, 1/4" and above, using 98/2 AR-O2 gets you into axial spray transfer......makes life a lot easier as the heat helps with wet out one the bead.....Paul

13:56 - Looked like a cake with steel frosting! LOL Beautiful welds! 🤤 Too bad we can't eat it.

@Welddotcom

4 күн бұрын

Lol don't put it past Austin to try and taste it.

Back that heat down ! Turn that wire down and stop pushing the puddle and that buckshot will go away and that rainbow effect will slightly appear , videos like this is what gives short circuit mig a bad reputation if you’re getting spatter keep turning the wire feed speed up until the machine starts popping then bump it back down slightly ,stainless likes to stay in the puddle and don’t “push” the puddle , also if you have an adjustable nozzle poke that tip out slightly on the gun , rather than sucked in an your puddle will wet out more . Make these changes an you might be surprised on the results .

What's everyone one running for inductance settings on stainless. I seem to end up around 95% for good wetting and low spatter. Is this bad?

That process needs to be pushed/ pulled to control heat.

I suggest to try Pulse mode.

@Mr05sti

6 күн бұрын

Yea, after he explains arc control and arc length....

@austinhargett5792

5 күн бұрын

Didn’t have that

Very interesting and informative video, thank you. Much, much better without that comic relief crap! Miss old Bob.

@Welddotcom

4 күн бұрын

Glad you enjoyed it

So not flux core?

@Welddotcom

4 күн бұрын

Not in this video.

Ss mig is my least favourite process. It's too fast for me if done right. And pulled if you want to minimise spatter. You don't feel like being in control at that speed. Really a different beast compared to carbon

@Welddotcom

4 күн бұрын

Very different indeed, You do have to travel pretty fast to get the outcome you are hoping for.

Why not just use C2? Whole lot cheaper.

@austinhargett5792

5 күн бұрын

You mean 98/2 ? Also a good option

@wreckless4thf

5 күн бұрын

​@@austinhargett5792Yes that's what I meant lol. You can use 2% CO2 or O2. I can't afford Helium 😂

Ok like 💙 ❤❤

@Welddotcom

4 күн бұрын

❤

98Ar 2O Is cheaper and better

@Welddotcom

4 күн бұрын

We will have to try it out!

98/2. screw the tri mix it costs a fortune. bad advice.