hey what's going on guys Austin Harga here AKA Dr Wells and I'm on the set of weld tube
as an ambassador for weld.com and we've got a great video today we're going to TIG weld up
some carbon steel and I'm going to show you how to get those fancy pretty colors we're
going to get some gold on that cap all right so y'all stick around you might learn something
foreign we got to talk about setup we got to talk about prep we got to talk about fit we got to talk
about size of pipe all that kind of stuff so today we're going to be running our TIG welding process
I've got some two percent thoriated tungsten 70s6 wire that good stuff we're going to be working on
schedule 120 right here it's some nice thick wall we're working with a 3 16 Gap all right that's my
personal preference I like a wide Gap so I can get that root in there nice and secure we're
going to be able to get a root in there at about 100 amps we're going to go ahead and Tack it on
all four sides about a half inch long tack on all each sides and then we'll go from there all right
so we're looking at it we want to make sure the high low is all good we've got it prepped Inside
Out bevels are shiny you want a nice good TIG weld you've got to weld over something nice and
clean right so we want to make sure we keep it that way the one big tip to getting color
on carbon steel is heat input having some thicker wall is going to help schedule 40 schedule 80 can
it be done sure but it's pretty tough you gotta be smoking it so let's get this thing teched up
down keeping that wire kind of towards the back edge of our bevel to make sure our attacks are
going to look just like our root pass kind of freehanding these tacks in at 100 amps
we're going to rotate it move it to the complete opposite side and we're going to check this
opposite side we want it to match right and we can kind of get our filler metal in there kind of give
it a wiggle to make sure we've got the room that we need that's going to help me get the route that
I want as far as some good reinforcement so now we're going to go on the complete opposite side
and put this second tack in start on the top bevel light up get a little puddle on the top pull it
down to the bottom Edge keep that wire towards the top of this big gap if you uh start putting that
wire towards the bottom you're going to notice you're going to get a little undercut across the
top so keep that in mind keep that wire towards the top while it's in this 2G position we're
going to look I can see I got a bigger gap on this side so I'm going to give it a nice Molly [ __ ]
to bring down that side and that ought to do it now we've got even
gaps all the way around we can put these other two tacks in foreign
guys so now we got the pipe tacked up we've got in the 5G position where it's running
horizontal with the ground right so we've got a nice fit up we've got everything cleaned up
now let's talk a little bit about that route okay we're running at 100 amps right that's
going to keep it at a nice nice Pace you know if you're a little bit slower maybe turn it
down if you're quick about it maybe turn it up a little bit you know everyone does it a
little different we're going to come in from the side tack here and we're actually going to
back feed this bottom keeping that wire towards the back working edge to edge we're going to be
working touching those edges and getting up it in a hurry you know so once we're grabbing that wall
we're grabbing those edges we're good to go again 100 amps 35 cfh on our argon TIG welding process
you want to learn more pointers about this go check out our weld app we've got a great
community on there great educational videos where you can even find jobs get on that weld app today
it's on the Google Play Store and Apple Store a great resource for all welders around the world
all right so what we're going to do is we'll make sure we're hanging on the bottom side of that tack
and using it as a brace as we come up the side you're going to want to feed more and slower on
the bottom than compared to as you start coming up this sidewall you're going to want to work towards
just the edge of that bevel you don't want to be too far in or we're going to get too heavy of a
root so make sure you're staying at the edge and make sure your tungsten is able to reach down into
this bevel we've got to work right into those edges our tungsten has to hit that wire right
there on those edges we've got to be able to reach down to those points right here and here we want
to be right on top of it if we have our tungsten too far back into that that cup we're not going to
be able to reach down there and this wire is going to be balling up and these edges are going to be
melted so we need enough stick out to reach down into that deep bevel and be able to bounce side to
side up this wire all right let's get after it light up on that tack get it nice and hot till
we get to the edge of it watch the edge of that tack burn back before you introduce any filler
you're going to want to feed into that root down there at the bottom nice and easy if you don't
put a little feed in it you're probably going to get a nice flat root working edge to edge
this 100 amps has let me take my time I can even pop out of that puddle grab some more wire
no problemo
edge to edge keeping that wire where it needs to be try to be centered if the Gap gets wide we'll
kind of Bounce and dance with it back and forth don't want to get any cold wires so we can't go
too fast all right now we got one side in let's go ahead and do the other remember we're going
to light up on this tack right in the middle get up to the edge of it introduce our wire and we've
got to give a little bit of a feed into it using that tack on the side as a brace let's get at it
working side to side the gap's a little snugger over here that's fine do our best to keep that
wire kind of split the difference of this bevel and just wiggling up the more you get to this
side the more that wire pops out like that you're going to get a little bit of a nugget
on the inside so just keep that in mind the more consistent you can keep your wire in
there the more consistent your roots gonna look getting up to the attack wiggle up that tack
get to it wait till it keyholes open then I can reintroduce my wire
and then wiggle wiggle wiggle getting a tighter Gap I can feel that wire not wanting to just fall
in there now it's kind of lay wiring so we're going to even go a tighter Gap or tighter wiggle
and apply a little bit of pressure we're going to dab this whole closed I'm even going to add a
little extra wire and and just sit on it a little longer watch that wire sink into it wiggle wiggle
wiggle wiggle faster tail up the side of the bevel so now we got the bead in there as you saw before
it was nice and gold color that's because this pipe was nice and cold it had uh you know plenty
of of meat in this pipe to pull that heat and kind of keep that color on there on as far as the
carbon steel now we're going to work our way to the hot pass you're going to notice that it might
get a little bit less gold to it but a couple other fancy colors in there we're gonna walk over
the machine we're gonna bump this thing up we're gonna hop past this sucker at 200 amps right off
the jump right and the thing with running 200 amps on a hot pass we've got to be very careful on the
bottom side of that pipe as soon as we light up we got to get that wire in there pretty quick if we
spend too much time on the bottom we're gonna suck back down Route so make sure when you're running
something hot like this if you want to take your time maybe go down to about 1 170 one at 150 would
be kind of cold for something this thick so I'm running 200 amps as soon as I light that Arc I'm
going to get that wire in there quick to make sure that I'm going to melt this to the pipe and not
get that puddle to pull back our route so let's get this hot pass in there going just a little
bit wider than our root pass keeping a nice even motion we don't want to spend too much time in one
location with this 200 amps we're already going to be cooking that root giving it a nice finish
the hot pass is going to set that root in there good at 200 amps so let's not spend too much time
in one location otherwise we're going to do a lot of damage on the inside of that pipe and pull them
back our roof nice even travel speed that's also going to be how you're going to succeed as far as
getting some good color the slower you go the more it's going to start kind of oxidizing at
a quicker rate and you'll see that you'll start getting away from that color and into that gray
kind of color scheme I like taking bigger steps than some you want to see a nice clean hot pass
you'll probably notice a nice line right up the middle of this hot pass when I'm finished
one crucial part just like the route when you get to finishing your hot pass you need to make sure
you tail out or pull to the edge of that bevel because you are likely to leave a fish eye if
you don't all right the hot pass is schlicked in there right it's good and crispy The Roots taken
care of now we're going to start hogging in some metal so I went up to some 532 70s6 wire a little
bit bigger a little bit bigger because we're going to put a little bit more metal in it right I got
my nice heat pad on there so I this pipe's going to start cooking so I don't want my fingers to do
so I don't care to freehand it because I don't like burning up my fingertips so I am going to
keep walking it whenever you're doing heavy fills like this you got to pay attention to the depth
of the bevel the very deepest part if you notice a roll at the deepest part of your bevel you're
probably getting lack of fusion at the bottom of that weld so make sure that you kind of wash out
that bottom and then feed into the top I kind of do a little dance with it as I go about filling
this heavy fill we're going to be taking our time we have enough weld in there that we can
focus on doing a lot of heat input and filling without pulling back our route so let's weld this
sucker I'm going to start off with a little bit of fill and then work into really grabbing some
extra I like to come across that puddle fill pull the wire out keep it in the Argon shield
and then wash back to the other side so that I can make sure that I'm tying everything in
the hill wash a little wash wire gets hung up that's all right we'll just get that puddle back
in there these fills ain't trying to be pretty we're just trying to get this pipe finished
trying not to get in a hurry don't step too big we want to keep a nice tight puddle
so the heat stays in one location I'm thinking I'm going to need to turn up my amps from 200
.
really watching the field just kind of watching the beveled edges kind of making
sure I stay at least even on those beveled edges and then the depth of the puddle I
can still see that I'm getting Fusion in the bottom of it it's really important
not worried about putting any pretty on it we're just worried about putting some big
fills as you can see the heat input is a lot more now now you see and we're getting a lot
of gray color as far as the oxidation on the Weld and this is going to continue all
the way out to our final fill and then we're gonna clean it cool it and then we'll cap it
all right guys well now we got that butter pass in there again we had a root pass we had a hot pass
we had one fill then a big old hog of a fill and then a two bead fill on top of that for this one
schedule 120 heavy wall we want to make sure when we got this fill done that the center of our fill
is a little bit past flush the edges are okay to be about flush but we want a nice little crown
on there that way when we go to cap it we don't have to worry about filling my motto is when you
think it's full put some more into it you want to be able to run your hand across it and feel
a little bit of a bump especially in the middle of that weld that way when you go to put your
cap on there you're not trying to spend so much time trying to fill and you're just able to Slick
one on there real good so to get gold as you can see on here we're back to gray we got gray color
there's no gold on it there is so much heat this sucker is spicy right so we got to take some time
we gotta let this sucker cool off and when I can sit here and grab it with my bare hand then we're
ready to cap and then we'll get back to what we saw in that root which is a nice shiny gold color
all right nice and cooled off now we can start putting the cap on here we're going to maintain
a 200 amps it's going to let us move fast fast and hot is going to be the trick for this now
as far as the size of the weld we can't go more than three sizes the diameter that's the rule of
thumb for the filler metal that we're using I'm using a 1 8 70s 6 Rod so we can just put some big
old fat weaves on here so we're gonna do a three bead cap on here side by side staggered stand up
always keeping your head in front of your torch it's going to let you see your Arc Length a
lot better if you ever find yourself behind your torch you're probably going to end up
slipping so either stop reposition or stand up move with the pipe move with the torch
you know we're trying to cap hot and fast 200 amps on something like this isn't that
hot especially if you're a production welder and you're working in position on a roll out
machine you know you could probably you could probably be cooking these suckers at closer to
300 but the fact that we're working in position 5G I've got to get underneath it gravity is
working against me I've got to move around 200 amps is something I'm comfortable with doing
one more game let's get back to the bottom and back to the top foreign only really looking to
get a sixteenth of an inch outside that bevel outside my weld area you know I don't want to
go too wide because then we're going to be out of code out of Tolerance so I'm making sure that
I cover the highest point of the previous Weld and only going about a sixteenth of an
inch outside my bevel Edge typically the speed being probably my smallest speed of the three
that's how we're gonna do it guys remember how to get gold on carbon steel has really
got to do with a couple of variables heat input is the biggest thing the thicker the
pipe the easier it's going to be just simple as that travel speed amperage gas coverage all
those marry up together to make one gold cap on some carbon steel I want to thank weldtube
for havingwell.com and myself out here if you like what you saw today please like
follow And subscribe not only myself Dr Wells weldtubeandwell.com and if you want to see more
great content like this check out our weld app that's all I got for you today doctor's orders