What is in the shielding gas C15?

What is in the shielding gas C15?

• A. 85% argon, 15% CO2
• B. 100% argon
• C. 70% argon 30% CO2
• D. 50% argon 50% CO2

Answer: (A)

Shielding gas composition shapes how the MIG arc behaves and how the weld bead looks. C15 is the blend of 85% argon and 15% carbon dioxide. This mix gives a stable, smooth arc like argon, producing a clean bead, while the small amount of CO2 adds heat and improves penetration and fusion without the excessive spatter or rough bead you’d get with higher CO2. Using more CO2 would boost penetration but also increase spatter and a rougher bead, while too little CO2 would reduce arc stability and penetration benefits. So 85% argon with 15% CO2 is the typical C15 configuration.

Shielding gas composition shapes how the MIG arc behaves and how the weld bead looks. C15 is the blend of 85% argon and 15% carbon dioxide. This mix gives a stable, smooth arc like argon, producing a clean bead, while the small amount of CO2 adds heat and improves penetration and fusion without the excessive spatter or rough bead you’d get with higher CO2. Using more CO2 would boost penetration but also increase spatter and a rougher bead, while too little CO2 would reduce arc stability and penetration benefits. So 85% argon with 15% CO2 is the typical C15 configuration.