![]() ![]() Aluminum is tricky, as you will have to provide ER4043 wire with 100% Argon gas.Ī high percentage of Argon or Helium added to a mix creates a hotter arc in the weld area. Besides choosing the proper type of wire, you should use an adequate filler thickness. ![]() As for stainless steel, C2 gas (98% Argon and 2% Carbon Dioxide) and ER308L wire type are your choices.If you are welding mild steel (carbon steel), the best choices are C25 gas type (75% Argon and 25% Carbon Dioxide) and ER70s electrode.In addition, the wire types (filler material) should suit the base metal, and here are some recommendations. ![]() In MIG welding, you will be mostly using Argon, Helium, CO2, or a touch of Oxygen. So before you start your welding, you will have to choose a mixture of inert gases according to a type of metal and adjust the flow according to welding conditions. Shielding gas plays a crucial role in protecting your weld bead from defects. Therefore, you should use the rule as a guideline for optimal performance and follow the manufacturer’s recommendations. However, some manufacturers claim you can use their machines rated at 200-250 amps to do it, while the recommendation says otherwise. So, when dealing with 1/2″ thick metals, you should provide 500 amps while following the rule. In addition, there are a couple of flaws when it comes to thicker metals. However, this rule applies to mild steel, while you will have to provide about 10-15% less current for stainless steel or 25% more current for aluminum. ![]()
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