Welding Stainless Steel

Stainless steel welding methods differ on the thickness and finish of the steel, in addition to what the finished piece is going to be used for.

Whereas there are a multitude of techniques for welding stainless steel, there are 3 that are utilized most frequently by metalworkers in the US. These techniques for welding stainless steel are TIG (tungsten inert gas) welding, MIG (metal inert gas) welding and Resistance welding. Read below to learn more about each.

1. Gas Tungsten Welding Or Arc Tig Welding

Providing high quality, adaptability, and durability, TIG is the most typically used stainless steel welding technique. This welding technique produces a low heat input, making it ideal for thinner material. Argon gas is typically mixed with other gases, subject to the needs of the specific piece, comprising of hydrogen, helium, and nitrogen. To hinder oxidation and increase corrosion resistance, a single-sided welding technique can be utilized creating inert backing gas safeguarding between the exterior and interior welds.

3. Gas Metal Arc Welding Or Mig Welding

MIG welding uses a semi-automatic technique that when done properly provides a strong connection of 2 pieces of stainless steel. This technique utilizes an argon rich buffer gas and a solid wire conductor.

MIG welding is favorable since it allows the metalworker to utilize a pulsating current supply, which makes it easier to weld those hard-to-get-to-areas on intricate stainless steel pieces. Other gas combinations, such as those with oxygen, helium, CO2, are often used to steady the arc and enhance the quality of the weld.

2. Spot Welding Or Resistance Welding (RW)

Resistance welding, or (spot), as it is referred to, is one of the most inexpensive kinds of welding. The RW device is incredibly adaptable, meaning it can be used on both small and large pieces.

This type of welding utilizes an electrified current to heat rough metal perimeter and seal them to each other. This kind of welding is unusually effective on metal that has a low melting point since it can be adapted to stop distortion of the steel.

Which Stainless Steel Welding Method Is Best?

Choosing the proper technique for welding stainless steel really is subject to what characteristics you’re in search for. If you’re in search of a more cost-effective weld, spot welding might be the best alternative for the project. However, if the material you’re working with is thinner, then gas tungsten arc or TIG welding could be the better decision.