Shielding gas

  1. Steven Paz New Member

    Messages:
    8
    Location:
    Fleet, hampshire
    Hi there i am a complete novice at welding and was told i can use c02 that they use in pubs is this correct?
     
  2. rtbcomp

    rtbcomp Moderator Staff Member

    Messages:
    18,615
    Location:
    Sheffield UK
    Welcome to the forum.

    You need to be careful with pub gas, some is pure CO2 and some a mix of CO2 and nitrogen, you want the pure stuff.
     
  3. Steven Paz New Member

    Messages:
    8
    Location:
    Fleet, hampshire
    Thanks for the reply what gas % wise is best to go for?
    Do you rent the bottles or can you buy them ?
     
  4. rtbcomp

    rtbcomp Moderator Staff Member

    Messages:
    18,615
    Location:
    Sheffield UK
    The most economical is 100% CO2 which comes as a liquid in the bottle, or you can get CO2/Argon mix which is better but more expensive and comes as a compressed gas.

    First and foremost avoid those small disposable bottles that you get from Machine Mart and the like, they last about 10 mins and cost a fortune.

    Have a look at the top of this forum http://www.mig-welding.co.uk/forum/forums/shielding-gas-and-regulators.27/ for what's on offer, it really depends who's local to you. Some places rent bottles, some charge you a one-off fee and the bottle becomes your property, in both cases you then pay to swap your empty bottle for a full one. The most popular ones for DIY welders are the pub-sized CO2 bottles which are usually non-rental.

    Don't forget you'll need a regulator to fit on the bottle.
     
  5. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    I get my gas from GasUK you pay a deposit for the bottle and get it back if you get the bottle back or a refill. I personally use their unwieldy bottles it's a mix of argon co2 and I think it's helium and it works a treat. It's a case of reading the descriptions and seeing what is best for what you need
     
  6. T0rnado69

    T0rnado69 DIY nut !!

    Messages:
    1,671
    Location:
    Basildon, Essex
    isnt that mix for stainless.?
     
  7. if you're welding mild steel that gas mix is not ideal, also it's going to be a very expensive way of doing it. As said above it's primarily for welding stainless
     
  8. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    The description says it's for thin steel upto about 5mm it really helps
     
  9. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    To be fair it might have been! I was typing without looking at the receipt it's been awhile since I got the bottle I've got to get a new one Monday I ran out
     
  10. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    No just looked definitely helium
     
  11. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    68%argon
    20%helium
    12%co2
    £50+£60 bottle deposit +£10vat
    GasUK. Co. Uk
     
  12. Richard Stowe New Member

    Messages:
    9
    Location:
    Potter Heigham
    Auto spelling on this tablet
     
  13. Definately more suited to stainless steel, total overkill for carbon steel, especially for a hobbyist type application but if it works for you and you can justify the cost keep using it
     
    pdg likes this.
  14. Agautosport Member

    Messages:
    248
    UK Somerset
    A simple mix of 5%CO2/95% Argon would be fine for welding mild steel .
    You probably have a local distributor for our gases and we still offer forum members a cashback on their first cylinder.

    Alan
     
    Last edited by a moderator: Mar 14, 2018
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