Argon / Carbon Dioxide / Hydrogen Mix


Small additions of hydrogen (1-2%) have been shown to improve bead wetting and arc stability when Pulse MIG welding stainless steel. The CO2 is also kept low (1-3%) to minimize carbon pick-up and maintain good arc stability. This mixture is not recommended on low alloy steels in the excessive weld metal hydrogen levels could develop causing weld cracking and poor mechanical properties.

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