Yesterday spent 1.5 hours to prepare two pieces of thick-walled pipe exactly for duplex. Can't wail Thursday to get some knowledge from my welding instructor. Thanks for vid Luke.
It's definitely a good bit more sticky/gummy than 304. If your job is going to be checking ferrite/austenite balance, be very careful to be as efficient as possible with heat input, and minimizing any given amount of material staying molten longer than absolutely necessary. Duplex is intentionally a matrix of austenitic and ferritic stainless, and they will precipitate out and sort into like structures the longer they stay molten. If the ferrite count is too high, it'll fail a hardness test and become extremely brittle. If it's skewed opposite, it'll fail an acid bath test.
@@Tragicduck In my specific case, the boiling in an acid bath and hardness was done on qualifying coupons, the ferrite was done on every single weld before it left the shop, as it's done with a standard PMI gun. Of course the hardness and acid bath are destructive testing. Of course checking ferrite count with a PMI gun, you can have a pretty good idea how it will perform in the corrosion/hardness test based on the result, as it has a strong correlation.
That's super interesting. Where would this be used? I hear so far duplex is mostly for aerospace but we use it at my plant for filtration but never had to test for anything . What do you do if you don't mind me asking?
@@Tragicduck We made flow meters in a few material varieties. 316 was standard material, inconel/hastelloy for high temp, and 2207 Super Duplex for chloride pitting resistance. Think chemical plants, chlorine, seawater, etc, process fluids that just eat 316 up like it's nothing. Curious what aerospace applications it has!
I'd imagine quite a bit considering rocket probably have quite the array of chemicals on board to run lol, that's cool as hell man thanks for the info I love learning about metallurgical stuff
Sim é uma boa demonstração de soldagem mais quero acrescentar que t para manter o padrão da soldagem deve ser necessário que o tungstênio mantenha o grau certo e a reposição de material de adição também pois o tubo vai mudando de grau conforme o seu contorno e se na técnica de Emerson do material fica bem escamada 👍🇧🇷🙏
Great job guys.Been learning quite a bit.Keep up all the great work and also by welding all the different materials can you guys go through the different processes with these said materials as well as doing some combo welding with them?
I used to weld S10 S/S for nuclear industry in the UK in the late 80s We used a square edge prep pulsed HI-LO tig keeping 1.6mm wire in the pool and Argon Hydrogen mix shielding gas
I always loved watching your guys videos it’s always been a dream for me to Weld but I’m not good with math blueprints and I suck at remembering things easily I tried getting jobs no one hires me dreams are shattered so I just gave up
No offense but “just gave up” is the reason nobody hires you. Keep your head on your shoulders and carry a better attitude about it. Tell them what you can do, not what you can’t do and they might wanna help you fix the issues you’re dealing with. With a mindset like that you’re only holding yourself back bud
100% argon yes. With super duplex ie Xeron 100, then an addition of Notrogen to the purge gas will help stop the loss of nitrogen within the weld metal.
Get some time in welding left handed. Test pieces are the simplest part of the job. Wait until youve got a butt with steelwork, walls, other pipes etc etc in the way and you have to weld left handed, and getting some time jn left handed will definitely help you out👍
Yeah, but the test piece qualifies you for the job and the dosh. 😁 Know what you're saying though, I can use my left hand out on site if I have to. No need for it in pipe shop with never ending "rolly polly" spools. 😉
The dudes who cant weld left handed always get stuck fitting 90% of the time at the powerplant i work at. No point in a 6g cert if you get to the field and all the welds have to be welded left handed on one side.
Hi guys, i'm from Uruguay. I was looking your page and i didnt find Pancake helmets, There is a chance of getting some of this from You? Or You aren't selling Pancake helmets yet? I hope You understand My Bad English.
@@kf8575 I’m not disagreeing but you’ve obviously got better eyesight because I don’t think Stainless is more runny than Duplex but I do notice a difference in welding alloys like Hastelloy
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Hello, what is the difference between stainless steel and duplex in terms of technique?
Yesterday spent 1.5 hours to prepare two pieces of thick-walled pipe exactly for duplex. Can't wail Thursday to get some knowledge from my welding instructor. Thanks for vid Luke.
Good jop 👌👌👌I m India Weldar 🇮🇳🇮🇳DSS
Been doing sch 10 2” stainless for the past month was definitely a learning curve, always glad to see new videos from you guys!
Hey, you got any advice to freehand 2in really struggling especially on position welds
Been welding 8”-24” s180 duplex for the last three months. Fun alloy to weld.
Been waiting for this re-upload
Great stuff guys
👍👍
Great ! What kind of tugsten did you use ? And what kind of filtre ?
What ampers do you go on root ?
Hello, what is the difference between stainless steel and duplex in terms of technique?
Hey can y’all do a review of the texas gold lens y’all have on the website, it seems legit , I just wanna see it in action lol
Good 6g vid very instutiv what type of tungsten electrodes where you using zirconiaged or thoriated electrodes or does it really matter ,
The gap looks more like 3/16 or 5/32 to me IMHO :))) Nice weld though!
What is the wire number I have to solder with? Is it 310?
Are you just using pure argon for both shielding and purging ?
The reason I ask, is that we have moved to 2.5% nitrogen in argon.
It's definitely a good bit more sticky/gummy than 304.
If your job is going to be checking ferrite/austenite balance, be very careful to be as efficient as possible with heat input, and minimizing any given amount of material staying molten longer than absolutely necessary. Duplex is intentionally a matrix of austenitic and ferritic stainless, and they will precipitate out and sort into like structures the longer they stay molten. If the ferrite count is too high, it'll fail a hardness test and become extremely brittle. If it's skewed opposite, it'll fail an acid bath test.
How come they test for hardness for ferrite or acid bath for austenite? Do they do this in the field or would it be mostly for qualifying welders?
@@Tragicduck In my specific case, the boiling in an acid bath and hardness was done on qualifying coupons, the ferrite was done on every single weld before it left the shop, as it's done with a standard PMI gun. Of course the hardness and acid bath are destructive testing. Of course checking ferrite count with a PMI gun, you can have a pretty good idea how it will perform in the corrosion/hardness test based on the result, as it has a strong correlation.
That's super interesting. Where would this be used? I hear so far duplex is mostly for aerospace but we use it at my plant for filtration but never had to test for anything . What do you do if you don't mind me asking?
@@Tragicduck We made flow meters in a few material varieties. 316 was standard material, inconel/hastelloy for high temp, and 2207 Super Duplex for chloride pitting resistance. Think chemical plants, chlorine, seawater, etc, process fluids that just eat 316 up like it's nothing. Curious what aerospace applications it has!
I'd imagine quite a bit considering rocket probably have quite the array of chemicals on board to run lol, that's cool as hell man thanks for the info I love learning about metallurgical stuff
What about when do you work out the shop with no foot pedal?
its big difference betwen duplex and super duplex ?
Get em Luke
How can you use MS chain for handling for this
nice goog welding bro
Good welding
perfect❤❤❤
What about id you work at the field
You go to carry your foot pedal?
What is WPS for thise
What is heat in put
excellent work, important to be able to have subtitles in Spanish, this video does not have it.
Sim é uma boa demonstração de soldagem mais quero acrescentar que t para manter o padrão da soldagem deve ser necessário que o tungstênio mantenha o grau certo e a reposição de material de adição também pois o tubo vai mudando de grau conforme o seu contorno e se na técnica de Emerson do material fica bem escamada 👍🇧🇷🙏
Thanks
Great job guys.Been learning quite a bit.Keep up all the great work and also by welding all the different materials can you guys go through the different processes with these said materials as well as doing some combo welding with them?
I used to weld S10 S/S for nuclear industry in the UK in the late 80s We used a square edge prep pulsed HI-LO tig keeping 1.6mm wire in the pool and Argon Hydrogen mix shielding gas
I always loved watching your guys videos it’s always been a dream for me to Weld but I’m not good with math blueprints and I suck at remembering things easily I tried getting jobs no one hires me dreams are shattered so I just gave up
No offense but “just gave up” is the reason nobody hires you. Keep your head on your shoulders and carry a better attitude about it. Tell them what you can do, not what you can’t do and they might wanna help you fix the issues you’re dealing with. With a mindset like that you’re only holding yourself back bud
what about the composition of Shielded Gas? Is it 100% Argon or What?
100% argon yes.
With super duplex ie Xeron 100, then an addition of Notrogen to the purge gas will help stop the loss of nitrogen within the weld metal.
Shouldn’t you use 100% N or 90% N + 10% H ?
No temperatures?
We can touch for MS do you no
nice
Valeu brother
Done some of this duplex in Cali, it welds very nice but I didn’t have the luxury of a foot pedal
What heat did you run? Gotta do some position welds w this stuff next week. Never messed w it
muito top
I find it easier to hold the torch with my right hand all the way round. Also like a "Tig Finger" to avoid blisters. 😉
Get some time in welding left handed.
Test pieces are the simplest part of the job. Wait until youve got a butt with steelwork, walls, other pipes etc etc in the way and you have to weld left handed, and getting some time jn left handed will definitely help you out👍
Yeah, but the test piece qualifies you for the job and the dosh. 😁 Know what you're saying though, I can use my left hand out on site if I have to. No need for it in pipe shop with never ending "rolly polly" spools. 😉
@@kf8575 Also, I would never put root tacks in a two inch exotic test pipe, Bridge tacks and a wedge for that wedding ring uniformity.😉
It's all about confidence ,which takes a good while and lots of experience to achieve.
The dudes who cant weld left handed always get stuck fitting 90% of the time at the powerplant i work at. No point in a 6g cert if you get to the field and all the welds have to be welded left handed on one side.
Like that , Buddy....
good
How to complete melting point please speak
A good tip would be to snip the end of wire before restarting
Not if you cool the wire in the shield gas area before removing it.
I need to now freight test
I'm a welder, too. If I were you, I'd do a half-keyhole welding. I'm korean
Hi guys, i'm from Uruguay.
I was looking your page and i didnt find Pancake helmets, There is a chance of getting some of this from You? Or You aren't selling Pancake helmets yet?
I hope You understand My Bad English.
Đoạn bắt đầu và điểm nối bạn thực hiện chưa thực sự tốt
Welded stainless for years easiest metal to weld but never used a cup that big for anything
Duplex runs like cold molasses compared to stainless. There is a huge learning curve to duplex, alloy 20, hastelloy, etc
So basically you are using the foot pedal to make it a pulse tig
😎👍
That boy Luke don’t know how to walk
how can u know this advanced shit when looking that young? u started welding when 5y old ? ;)
no different to welding 316L stainless or Inconel 600
Isnt much different from stainless other than being a bit less fluid, other than that youve just got to be careful with heat input thats all
@@kf8575 I’m not disagreeing but you’ve obviously got better eyesight because I don’t think Stainless is more runny than Duplex but I do notice a difference in welding alloys like Hastelloy
@@Then.72 i just meant it doesnt seem to want to flow as quickly without upping the amperage a touch. Other than that, i dont see the difference
@@kf8575 I use the same amps for these alloys but we aren’t all the same and I know welders I work with weld different to me and are very good
Need to quarter your weld to prevent dogglegg
Tgx
Hl045
Lol
Cheap employers not buying tin 3M can pound sand. I’ll walk off the job!
Put a piece of foam on the end of the purge line. Spreads the argon so that you don't get turbulence!
You better make good on that while your eyes are still good because wait till you get older you won't be able to feed through the bevel trust me
Cheater
For bottom wht is current to start off