Welding thick 4130 parts requires a preheat in order to prevent hard brittle areas. ER70 filler wire was used.

There are several different techniques that work for tig welding coped tubing.
This video explores a few and shows instructive arc shots.

Welding is when you melt the base metal.
Brazing is above 840F but not hot enough to melt the base metal.
Tig brazing with silicon bronze is a very useful thing to know

TIG Welding Text books show an optimum torch angle but in the real world, those optimum angles go out the window on odd shaped parts with limited access. Fortunately, torch angle is usually pretty forgiving

In this video, you will see the importance of cleaning mill scale along with several other tips for tig welding steel

There is a technique for tig welding called "walking the cup".
While its mostly useful for pipe welding, it can also be a good technique for long runs on fillet welds.
In this video, I talk about cup size, electrode stickout, and how to hold the torch.
I set the lincoln TIG 200 to 177 amps and p...

39 pps, 30% background current, and main amps set to 124 amps.
11 ga carbon steel
3/32" 2% lanth electrode
1/16" er70s6 wire
#8 cup 20cfh argon

Do you ever have your setup just right, machine settings perfect, gas flow rate right where the books say, arc gap is spot on, speed dialed in, and you still have a rough time with your welds coming out right? You might be missing one simple step....

This video shows the dip keyhole technique for a root pass on 2 inch sched 80 pipe. fill and cap passes also

I first learned about tig brazing with silicon bronze while I was moonlighting at a sheet metal fab shop.
Owner brought me a hydraulic tube from the forklift that had sprung a leak and was worn paper thin and also handed me a piece of silicon bronze filler rod. I show a mockup of that repair in ...

In this video...you will see settings, tips, techniques for TIG welding a vertical 3F tee joint - carbon steel 11ga
The ABC's of welding
Always be comfortable

In this video, you will see TIG Welding Carbon Steel along with Tips for unique propping tool when using a weld positioner.

Teaching a friend a crash half day course for tig welding square tubing so he could weld a chair project out of square tubing

Getting full and uniform penetration on 11 ga carbon can be a challenge.
Sometimes requires a bevel and 2 passes

In this video...Tips for Walking the Cup welding a Stainless Steel flange to Carbon Pipe

this video shows hot pass, fill, and cap on carbon pipe welded to a stainless flange...not walking the cup

This video shows tig welding carbon steel coped tubing with settings, gas flow with a 10 cup, and common mistakes

This video shows selecting cup size, walking the cup technique tips and clear arc shots so that you can learn to walk the cup if you are struggling

Video shows walking the cup on a 2" carbon steel socket weld in a tripod vise. Socket welds are not commonly taught in welding schools so hope this helps

This video shows TIG welding several different alloys. Carbon Steel, 4130, Stainless, and Aluminum. Arc Length is key

This video shows tips, tricks, settings, and techniques for TIG welding 18 ga carbon steel lap joints

This video shows tips and techniques for tig welding 18 ga outside corner joints along with flash tacking, different cups, and chill bars

TIG welding an outside corner joint on 11ga carbon steel and showing different ripple spacing and what that looks like on a cross section macro.

The ABCs of welding are Always BE Comfortable. Finding a way to prop when you are welding overhead can be the main issue and makes a big difference. Sometimes you might even need to use a clamp to prop on . whatever it takes to get comfortable.