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Argon-CO₂ mixes are used as shielding gas in MIG / MAG welding processes.

Product information

The gas capacity of a cylinder can calculated in two different ways. The most simple method is the water capacity of the cylinder (in litres) multipled by the actual pressure (in bar); the result is the capacity in litres. Although a simple method it is not the most accurate method. A better but much more complex method will give a more accurate value for the gas capacity; it will take the compressability of the gas at both 1 bar and at the actual pressure in consideration and all based on 15 degrees C. The result is often quoted as normal litres or normal cubic metres (nm3). For argon the more accurate method will give a slightly higher value as compared to the simple method i.e. (10.9 m3 versus 10 nm3).


  • 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



Cylinder Type M-50

Physical properties

Colour grey with yellow shoulder


Connection [Size/ Type] W24.32 MM X 1/14"
Diameter [mm] 230
Gross Weight [kg] 98
Height [mm] 1690
Weight [kg] 17.1 Net

Technical data

Connection [inch] W24.32mm x 1/14" RH Ext side
Filling pressure [bar] 200
Function WELDING
Purity 20 +/- 2% CO2
Volume (l) 50

Performance data

Gas Capacity [m³] 10.9


Product name Product number Diameter [mm] Gross Weight [kg] Height [mm] Weight [kg] Cylinder Type Gas Capacity [m³] Connection [inch] Volume (l)
UNIMIX 20 M-10 FILLING 905573 140 22 1000 4 M-10 3.4 W24.32mm x 1/14" RH Ext 10
UNIMIX 20 M-50 FILLING 905581 230 98 1690 17.1 M-50 10.9 W24.32mm x 1/14" RH Ext 50