Whether TIG welding, Mig Welding, Stick welding, or any other process, Restarts are part of the process. If you can make a decent restart, you are a lot less likely to have weld defects and a lot more likely to make a good looking weld.
What is the 3 second rule?
The 3 second rule says that it ...
TIG Welding Stainless - Filling holes in Stainless Sheet metal
Stainless Steel needs either backing or argon shielding to the back side when the back side melts. Argon shielding usually gives the best quality but Copper or Aluminum backing can also work fine depending on engineering or code requirements
TIG Welding Tips for Purging and Grounding Stainless
TIG Welding Stainless Steel tubing with full penetration requires a purge in order to prevent severe oxidation on the inside.
There are some applications where purging the inside is an absolute must...especially in food service applications.
The manifold in the video is not required to be done ...
In this video ... you will see Tips and Techniques used for TIG Welding a Stainless Steel 16ga Butt Joint with argon shielding on the penetration side. Fully penetrated stainless steel needs argon shielding on penetration side in order to maintain properties
Dimensional restoration is a big part of aerospace maintenance.
A whole lot of aerospace tig welding is restoring worn metal.
And that often involves being able to weld a very small bead on an edge.
The thinner the metal, the more difficult it is so its good to start thick and work your way dow...
Aerospace tig welding tests almost always involve a fixture like the one shown in this video. Little details like how you place the chill bars can make a big difference.
Even though it would be rare to weld plain 304 stainless for aerospace, the tips still apply.
Typical test material for th...