How to Weld 316L Stainless Steel

According to MIM Forms, "316L stainless steel is commonly used in applications requiring high corrosion and heat resistance, toughness and long life." Add the ability to be polished easily and you have an attractive metal that is easy to work with. Composed mainly of 71 percent iron, 17 percent chromium and 12 percent nickle, 316L stainless steel is virtually non-magnetic. Welding with 316L is quite common. However, certain steps help to make the process easier.

Things You'll Need

• MIG or TIG welder
• Tri-mix gas
• 316L wire

Instructions

1. Use the proper mix of gas for welding 316L stainless steel. The proper ratio must be 90 percent helium, 8 percent argon and 2 percent carbon dioxide.

2. Weld 316L stainless steel using wires that are 316L.

3. Use .04 inch wires when welding .08 inch 316L or less stainless steel.

4. Keep the sulfur range between 0.005 to 0.030 percent in order to ensure the proper amount of penetration.

References

• MIM Forms: 316L Stainless Steel
• Miller Welds: Successfully Wlesing Sheet Metal with MIG and TIG
• Azomaterials: Stainless Steel - Grade 316L -- Properties, Fabrication and Applications
• U.S. Department of Energy: Considerations for the Weldability of Types 304L and 316L Stainless Steels