Argon/CO2 Mix
An argon/CO2 mix is the standard MIG shielding gas for mild steel — argon for arc stability, a little CO2 for penetration. Rent-free at Adams Gas, in hobby to trade sizes.
Benefits & features
Full MIG/TIG/mix range
Pure argon for TIG and aluminium, argon/CO2 mix for MIG on steel, and pure CO2 as the budget option — all in stock.
Rent-free cylinders
No monthly hire and no contract, unlike the big-brand rental model. Pay for the gas plus a one-off refundable deposit only.
Fast cylinder exchange
Swap an empty for a full cylinder of the same gas and size in minutes — no waiting on a slow on-site refill.
Why argon/CO2 is the MIG default
MIG mixes are argon-rich with a smaller proportion of CO2. That balance gives a smooth, low-spatter arc with good fusion, which is why it is the default for most MIG work on mild steel. The argon keeps the arc stable and the small CO2 share adds the penetration mild steel needs.
It is a MIG gas, though — for TIG and for aluminium you need pure argon, not a mix.
Mix, pure CO2 or pure argon?
Argon/CO2 mix — the all-rounder for MIG on mild steel: clean arc, low spatter, good fusion.
Pure CO2 — the budget alternative for mild steel. It welds the same metal for less but runs a harsher arc with more spatter to grind back.
Pure argon — for aluminium and for all TIG, where any CO2 would contaminate the weld.
Frequently asked questions
What ratio is the mix?
Typical MIG mixes are argon-rich with a smaller proportion of CO2 for mild steel. Tell us the work and we will point you to the right cylinder.
Can I use the mix for TIG?
No — TIG needs pure argon. The argon/CO2 mix is for MIG on mild steel.
Can I weld aluminium with the mix?
No — aluminium needs pure argon. The CO2 in the mix would contaminate an aluminium weld.
Rent-free welding gas, ready when you are
Shop MIG, TIG and mixes online, or find your nearest stockist.