When MIG welding steel – you can push or pull, just stay consistent. Changing from a push to a pull during a weld will affect weld penetration and appearance. This is because it normally takes a slight change in wire speed when changing from pushing the gun to pulling it. Also, the angle of the gun determines if the weld wire is hitting the colder edge of the puddle (as in a push angle) or pointing to the hotter part of the puddle (pulling). The pull will give you deeper penetration, so if you are welding thinner material, use the push method to prevent burn through.
When you’re TIG welding, push the torch at a 10- to 15-degree angle, whenever possible. And never pull a TIG torch. This makes sure you have proper gas coverage and cleaning of the weld zone. If you pull the torch, it will cause the weld bead to appear black and contaminated.
Until next time,
Andy WeyenbergMotorsports Marketing Manager