Welding 101 - How to Prevent Undercut

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#welding #welddotcom #undercut
Beau goes over how to prevent undercut in your welds. We get this question often in our DM's and on the forum. We know it's something you guys are always trying to improve on. What other issues are you having that you need help with? Post to our forum for help! www.weld.com/forum
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Опубликовано:

4 июл 2024

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Комментарии : 78

@micdiva 2 года назад

How do you prevent undercut on a 6g pipe welding with 7018. Im having a super hard time with on my last cover pass on the top side of the weld. Especially from like 3 to 9 oclock

@InchFab 2 года назад

Make sure it's cooled off, or slow down a little.

@micdiva 2 года назад

@@InchFab I wait till I can keep my hand on it for like 10-20 seconds. I feel like I run a pretty slow and consistent speed. I'm running 1/8" at 105-110

@atomichydrogenweld2823 2 года назад

pause longer on the sides might help

@gargar8196 2 года назад

Keep practicing. That’s a tough test. Wire brush and grind and then finish. Or count to ten and finish it

@beaujamesblues 2 года назад

When I was in school it was a speed issue with me. Make sure you are paying attention to the top of the puddle and remember how much heat you are putting in the higher you get on the pipe.

@Psychodermia 2 года назад

Dude, by the time you got past the different electrode manipulations, I forgot this video was about undercut. This was just a really, really good informational video for new welders. Brilliantly done! ✌️👽

@LilFish0 2 года назад

Thank you, I’ve been trying to combat undercut in my welds.. this seems to be the ultimate guide

@beaujamesblues 2 года назад

Thank you I definitely was pumped to learn these in school.

@grumpyone5963 2 года назад

Much appreciated. Always worth listening to.🇬🇧

@beaujamesblues 2 года назад

Thank you for watching out there!

@toolbox-gua 2 года назад

Great video. Great lesson. Very clear teacher. Thank you.

@ballista7117 2 года назад

I’m so glad you made this video before I watched this my vertical weaves looked horrible but yesterday I made mine look like yours

@veritas4511 2 года назад

Masterfully conveyed. Thank You.

@atomichydrogenweld2823 2 года назад

Outstanding, Beau, you are rocking it......great information......keep up the great videos....we really appreciate them......hey, I went to GTCC too......class of 2001

@beaujamesblues 2 года назад

Great school I learned a ton out there!

@jwdickinson643 2 года назад

very nice presentation, son! very informative!

@paulenespika9119 2 года назад

A very important issue when welding and you addressed it well. I don't want to be Debbie downer, but when it comes to showing the actual arc in motion, Bob Moffitt had the best videos. They focused in on the actual puddle without a lot of flash and flare.

@atomichydrogenweld2823 2 года назад

I think he had a better camera.......

@gargar8196 2 года назад

For your age you understand the process. Good job 👍

@beaujamesblues 2 года назад

Thank you!

@mr.ranyhomemade2466 2 года назад

Very nice to share your experiences Thanks 😊

@beaujamesblues 2 года назад

Absolutely thanks for watching!

@victoryfirst2878 2 года назад

Thanks for some real great tips on undercut control. Good day fella too.

@beaujamesblues 2 года назад

Thank you so much for watching I hope it helps!

@bobhigginbotham9035 2 года назад

Excellent video Beau! 🤘🏼☠️🤘🏼

@JasonVladimir 2 года назад

Good show! Thanks for sharing!

@CxckSwamp 2 года назад

My teacher told me about this yesterday I didn’t fuck up that much because he still got super happy with my weld buuuuut me being me i like to do things in a perfect way which I know no one’s perfect but thanks for this vid I’ll apply your knowledge with his 🔥💯

@georgekefallinos8120 2 года назад

Thank you

@jk12428 Год назад

Thanks Dude good talk’

@MRJ37 2 года назад

Need an answer asap I just bought “Tweco electrode holder 500 amp”, and this thing is kinda more huge than I expected. I stick weld at delmar college and my other electrode holder is 250 amp but bought a new one because jt sucks at holding rods. Anyways I just need your word if it’s meant for different amperage’s and not low ones like 200-300 amp. Because it was atleast $80 and feel like I kind of wasted money. It looks like it would be perfect for 1/8th rods and even bigger but if you can tell me that it can be used just like my 200amp electrode holder as well I’ll greatly appreciate it.

@thehostwiththemost5516 2 года назад

Bend testing on a 6G tig root and hot, 7018 fill and cap. I always get undercut on the bottom cap pass

@ELRman86 10 месяцев назад

Where I work, we weld a lot of 1"- 4" plate and use spray transfer (typically 28.5-29.5V 300-325A with 98/2 gas and .045 wire) I'm getting undercut, but I don't want to dial my heat down too much. Am I going to have to dial down or is there a technique I could try to prevent this? Any help would be greatly appreciated! Also if you are curious about the metal thickness, it is because we do testing on high pressure steam systems 2000+ psig with piping and valves up to 28" sch 160 GR-C. No I don't weld the pipe, we have real nuclear certified welders for that. I just build the stands and fixtures. I would like to get Nuke certs one day though but right now my skills are not up to par for that.

@mongomay1 2 года назад

Does it make any difference whether you are pushing the weld puddle instead of trailing it? I push most of my welds to pre-heat the parent metal.

@AlexA121890 2 года назад

With mig the difference of push vs pull is negligible. I prefer to push so i can see the puddle and travel direction better. Only time i push with smaw is uphill in the 3rd position.

@lacombar 2 года назад

Speaking of undercut without ever showing any... thanks... !

@byronfuentes1281 2 года назад

Great job on your video. Was hoping y’all could discuss welding in the downward direction as a means of repairing undercut. Does it work? And why?

@beaujamesblues 2 года назад

I am not 100% sure about that but I am interested to learn myself.

@cliffdanis1521 2 года назад

Bryan, Typically a downhand weld is less prone to undercut as the mechanics of the weld are changed physically. Traveling with gravity vs against it defiantly helps reduce undercut. There are a few take-aways that I think need to be considered when attempting to repair undercut with a downward weld. First and foremost, is the code you're welding to allow a downhanded procedure? Has it been qualified? Most procedures and qualifications specify the position and the direction of travel. I think this should be in the forefront of your thought process. If its allowed it can be a quick fix. Unfortunately, more often than not, its not allowed. I would hate for a guy to get in trouble because a good weld wasn't repaired correctly! I would direct this question to your QCM or shop Forman for an answer according to what your specific application is.

@AlexA121890 2 года назад

Downhill welding isn't recommended unless you are laying in a root pass with 6010 on pipe or fabricating some thin material. Welding procedures call for uphill travel

@lar1664 Год назад

What advice can you give with spray arc? Multipass tee joints. You can't do manipulations. I think in sine situations gun angles go out the door its really about watching the puddle because gun angle will have to be adjusted. I think overheating can also cause a lot of the undercut. The last bead on top is always the hardest weld because its always the riskiest pass if the conditions aren't correct.

@antoinejames8071 Год назад

In my experience with spray transfer, letting the metal cool after a couple passes really helps with undercut. And a little manipulation can be done with spray transfer, just have to be quick with it. Can't rush spray cause of the intense heat transfer. Cooling is the main thing in spray transfer to prevent undercut.

@davidleblanc9676 2 года назад

Yep young man that looks about right

@beaujamesblues 2 года назад

Thanks for watching!

@tigroottighot7018out 2 года назад

How to prevent porosity using 7018

@mainesteam4636 2 года назад

Undercut is the new pay scale

@metyheaval 2 года назад

A beginner welder should not learn to weld with any manipulation or weaving techniques with mcaw aka mig specially in fillet welds. You should only weave or use any manipulation if filling gaps or welding vertically. Otherwise it's like buttering bread and you will lack penetration into the wild joint. To many of these welders on RU-vid teach this practice but it's improper and is why so many fail tests. It is also a safety hazard depending on what you're welding. If it's structural and that weld breaks people can get injured. The moment I see videos teaching this process outside of filling gaps or vertical welds I stop the video instantly.

@rayrijndorp5750 2 года назад

Why jou dragg the weld?

@jbodden6977 2 года назад

you alternate between amperage and voltage like they are the same thing.... you might want to edit that and fix it.

@revan1202 Год назад

Great advice bud, me working a shipyard....Not one single bit advice here is going to help or save me....sigh. Sorry for the half jokes I have to tell others in classes that the prep and material even the booths don't exist out here. You're going to get rust paint piss and shit where you have to weld and that's if you will either see it without a tiny flash light and a mirror in spot that you might only get your hand in.

@mindgames9614 2 года назад

Where i work they say dont use any manipulation

@atomichydrogenweld2823 2 года назад

but how much is any? I guess they want stringers, what process are you using?

@beaujamesblues 2 года назад

That is another manipulation for sure these are just what works for me on my projects but I am trying to master the drag as well.

@gargar8196 2 года назад

Unless you are using 7024 jet rod you have to manipulate the weld

@mindgames9614 2 года назад

@@atomichydrogenweld2823 mig spray, building locomotives

@mindgames9614 2 года назад

@@gargar8196 not true

@bertyadventures 2 года назад

I like to push when I SMAW

@scottcarr3264 2 года назад

I would not be allowed to grind my job back that clean, Before mig welding.

@SuperJoooe 4 месяца назад

Why would you manipulate hardwire period....and who pulls hardwire btw

@stackingdimes6939 2 года назад

Your mig is incorrect you don’t drag and your bead is convex it’s a fail on any test

@SuperJoooe 4 месяца назад

Those welds look terrible...those that can't do teach!!lol

@adamray2305 2 года назад

Soooooo I hate to be this guy... But If you're making a video about Undercuts... you might want to explain what an Undercut is?!?! Just food for thought