For those familiar with the world of welding, metal melting is familiar but can be tricky when working with thin metal. There are many types of metals you can weld. Not only are there many metals, but there are also many terminologies.
Terms like MIG and TIG are often confused since they are similar. When working with a thin metal, although both methods can be used, there’s a preferred method.
So, what do these terms mean?
MIG
This stands for metal inert gas. The feed wire in a MIG welding gun moves consistently, generating a spark. This creates the weld by melting the metal.
It can be used to weld materials such as:
- Stainless steel
- Carbon steel
- Nickel
- Copper
- Magnesium
- Aluminum
- Silicone bronze
MIG welding is much easier to perform than TIG and can be done with one hand. MIG methods are commonly used for thicker metals. If you are interested in speed, MIG welding is great. Now let’s move on to TIG to know the difference between MIG and TIG welding.
TIG
This stands for tungsten inert gas. Metals are fused by using a pair of rods. It needs shielding gas, mostly pure argon or argon mixed with helium. It can use a direct current or alternating current depending on the metal the welder is working with. TIG gives a precise and versatile arc welding method that can join almost any metal.
It’s usually used to join metals like stainless steel, aluminum, chromoly, nickel alloy, magnesium, titanium, and other nonferrous alloys. It’s possible to TIG weld without gas, but shielding gas does play a big role. Without it, it will have a high risk of contamination and may result in weld cracking and the joint not joining and breaking in two.
What’s The Difference?
For TIG, a tungsten electrode is what gives the electric power for the arc. The electrode here won’t be consumed, and an additional welding rod is typically used. On the other hand, MIG is consumable as it utilizes electrode materials that become part of the weld. The wire electrode is usually made from copper-coated steel.
Which Is Best?
Both can be used to weld thin metals, but what we are looking for here is which is best. TIG methods are best used for thin metals. Welders can lower the power so they don’t penetrate through the metal. TIG does require a high skill level and is slower than MGI because the electrodes are fed automatically for MGI.
Overall, TIG is best when working with thin metals.
Tips to Avoid Issues When You’re Working With Thin Metal
Longer welds with high heat input should be avoided. This will cause too much heat to build up. It’s best to run a series of short welds at different points in the metal that will eventually join together. Letting the metal cool for a second between welds will help the heat disappear.
If the welder doesn’t work with a tack timer, you run the risk of the arc being lit longer than it should. It’s super-helpful if your welder supports a tack weld timer. You can also use a higher welding speed to avoid too much heat in one place for too long. It’s important to practice welding safety at all times!
Final Thoughts
Thinner sheet metals can be difficult to work with for welders of all skill levels, but care, patience, and practice are your best tools here.
Even professional welders have their difficulties – it’s important to know what method is best for thin metal and tips to help avoid any warps or burns.
