Type Of Gases Used In Welding Machines

It's important to use the correct amount and type of gases to maintain the welding machine performance. Here are some tips that you can use to maintain your welding machine:

A 75 percent argon/25 percent CO_{2 (carbon dioxide)} blend (also called "75/25" or "C25") works as the best "all purpose" shielding gas for carbon steel. It produces the least amount spatter, best bead appearance and won't promote burn-through on thinner metals.

100 percent CO₂ provides deeper penetration, but also increases spatter and the bead will be rougher than with 75/25.

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Proper Wire Selection When Using A MIG Machine

When welding steel, there are two common wire types. There is an AWS classification ER70S-3 for all-purpose welding. You should use the ER70S-6 wire when more deoxidizers are needed for welding on dirty or rusty steel. As for wire diameter, .030-in. diameter makes a good all-around choice for welding a wide range of metal thicknesses in home and motorsports applications. For welding thinner material, use a .023-in. wire to reduce heat input. For welding thicker material at higher total heat levels, use .035-in. (or .045-in. wire if it's within your welder's output range).


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