CO2 & Mixtures

Carbon Dioxide (CO2) is the most common of the reactive gases used in MIG welding and the only one that can be used in its pure form without the addition of an inert gas. CO2 is also the least expensive of the common shielding gases, making an attractive choice when material costs are the main priority. Pure CO2 provides very deep weld penetration, which is useful for welding thick material; however, it also produces a less stable arc and more spatter than when it is mixed with other gases. It is also limited to only the short circuit process.


Additional information


CO2-Pure, 30% Beer Mix Gas, 40% Beer Mix Gas, 55% Beer Mix Gas, 75% Beer Mix Gas, Food Grade Dry


1.1kg, 1.9kg, 2kg, 2.3kg, 3kg, 4kg, 4.5kg, 6.8kg, 22kg

Cylinder Type

Customer Owned, MyKegOnLegs Aluminum Catalina, Steel


Food Wine & Beverage, Welding & Metal Fabrication

Use Purpose

Carbonation & Dispensing for Soft Drinks & Beer, Inert Shielding Gas

Purchase Type

Cylinder with Gas, Drop Off & Collect (Allgo Depot), Swap – Refill (Onsite)


D = 1.9kg

F = 22kg


Nitrogen Beer Mixes – Beer Gas
30% Carbon Dioxide balance Nitrogen.  Generally used to pour thicker beers such as Guinness

40% Carbon Dioxide balance Nitrogen. For less carbonation

55% Carbon Dioxide balance Nitrogen. Suits most Sites

75% Carbon Dioxide balance Nitrogen for more carbonation in longer beer line runs/

Cylinder Details

We look after all maintenance of the cylinder it is a simple swap system.

Steel cylinders last only 5 years between tests because of CO2’s corrosive properties

MyKegOnLegs Aluminum Catalina
Advantages of using Aluminium cylinders for CO2:

  • 10 years between test
  • Aluminium light weight cylinder
  • High quality cylinder and valve.
  • Cylinders last longer and keep their appearance as they do not rust.

Thread Size: 1.125-12UNF-2B (Type 30 thread).

Customer Owned
Allgo Gases reserve the right to refuse to refill a cylinder if it is out of test, damaged or not compliant with Australian Standard.



Prices include GST and Free Delivery in Metro Area
Refills are delivered on a swap basis.

Special Mix refills are done on a Drop Off/collect – no swaps.

For Allgo Gases Collection & Return ADD $20 unless there are other cylinders in the delivery

Safety & Documents

Australian Standards Colour Code: Grey Green. Elemental Symbol CO2 Allgo Gases reserve the right to refuse to refill a cylinder if it is out of test, damaged or not compliant with Australian Standard. Safety and gas monitoring equipment is to be installed and maintained by the proprietor of the venue and beer line gas systems must be AS5034 compliant.


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