Product information

For the purity the specification is: CO2 20 +/- 2%, Oxygen < 10vpm and Moisture (H2) < 10vpm

For argon/CO2 mix (Unimix) the following is valid:

  • 1 nm3 = 1.571 kg
  • 1 kg = 0.598 nm3
  • 1 bar = 14.5 psi
  • 1 nm3 = 35.3 ft3
  • 1 kg = 2.2 lbs


  • Argon-CO2 mix is a colourless and odourless gas
  • Argon-CO2 mix is slightly heavier than air and is an inert gas
  • Argon-CO2 mix is non-combustible
  • It's used as a shielding gas for welding, primarily to protect the molten pool against contaminants in the atmosphere
  • 80% Argon/20% CO2 mix is suitable for welding all un/low alloyed carbon steels
  • Unimix gives a very stable molten pool together with optimum energy transmission


  • For your safety, the product is delivered in a Unitor cylinder complete with barcode and unique cylinder serial number
  • We trace and track all cylinders using the UniTrak system to give you peace of mind