Classic cars forum & vehicle restoration.

buzzy bee · Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire

Hi

Further to Ricks sugestion here is a continuation of the welding ideas in the Devon thread in "your restorations".

So mag, should be better for sligtly unclean surfaces, with little distortion. I supose mig with the higer amps may distort more.

What does CO2 come into?

I will look for my notes next time I am in the loft, living in a 3 story hose means having to carry the step ladder up two flights of stairs to get in the loft.

Cheers

Dave

Rick · Site Admin Joined: 27 Apr 2005 Posts: 22788 Location: UK

Although I know very little about the subject, I found using c02/argon mix much easier to use than pure argon. Just thought I'd mention it Smile

R
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Uncle Joe · Guest

I'm actually beginning to get a little confused here.

I just checked on Aga's homepage (my gas supplier). The mix is classed as a MAG gas. In some old papers from 1988, its classed as MIG. In those, CO2 is classed as MAG....oh woe is me!

Aga recommend 25/75 for MAG welding stainless as well....

I wonder whats correct?

buzzy bee · Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire

Hi

I thought Co2 was Mag, but there we go!

I think we used to use Argon cougar 5 for mig at college, not sure what they have at the boiler place, I will have to have a look.

Cheers

Dave

Uncle Joe · Guest

Buzzy, try to see what the actual mix is, then I can reference it here. Just think, if the names were the same internationally, that would be a standard, wouldnt it? Laughing

100% Argon (I think) is used as an Inert gas here, mostly for TIG.

dalbuie · Joined: 24 Dec 2007 Posts: 408 Location: Gullane

Happened to be reading the Hayes Classic Car Restoration book last night and was on the welding chapter.

MIG - Metal Inert Gas - is only true when using Argon, as this is truly inert and does nothing except stop the weld having access to oxygen.

MAG - Metal Active Gas - is the standard method when an Argon/CO2 gas is used. The CO2 is active in the weld and helps to give a deeper weld with better penetrtion.

In the main both are called MIG.

There's also a great site and forum @ http://www.mig-welding.co.uk/
Cheers
D

Uncle Joe · Guest

About that site, my ''welding mentor'' who sadly passed away a few months ago, thought that it was the funniest site on the internet.... Laughing

Personally, I'm not going to make any comments about it!

ukdave2002 · Joined: 23 Nov 2007 Posts: 4240 Location: South Cheshire

I remember an " Uncle Joe " on that site !!!! Wink

dalbuie · Joined: 24 Dec 2007 Posts: 408 Location: Gullane

I've always found the guys on the forum very helpful, much like this site, with no question to stupid.

ukdave2002 · Joined: 23 Nov 2007 Posts: 4240 Location: South Cheshire

Dalbuie I agree, its a very good site, lots of good information.

There was an interesting debate about how many different gases were required to do a certain job, as I remember UJ !! Wink

Dave

buzzy bee · Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire

buzzy bee · Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire

Uncle Joe · Guest

You are correct guys. I did post on that forum once upon a time. Cant remember the gas discussion, but I do remember one about different welding methods.

buzzy bee · Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire

Hi

I asked the welder at work who welds the boilers, and in the UK at least there is little left of Mag, it is all mig now, you can use co2, argon, cougan, helium all sorts all with mig, so what used to be mag, is now mig. In some parts of the world it is still called mag, and mig, but it is a bit pointless in his oppinion.

The wire is the main thing, and not just the type, the quality, between the same so called wires. Different wires and gasses, stop welds on certain materials being so brittle etc.

The name Mag was more commonly used before Argon was brought in, as aparently it changed alot of things. Co2 had gas heaters to stop it freezing noe argon does this instead of a heater.

Anyway this is what I remember him saying, he did say hell of a lot, so above sounds a little disjointed, and some may have mistakes in it, due to me struggling to remember it all!! hehe

Cheers

Dave

Uncle Joe · Guest

All these name changes are a little confusing to me, so I think that I will stick with the ones I know.... Very Happy

To old to learn new ones.

Wire quality is important. I know my preference when MAG welding cars, the trouble is, its difficult to get hold of here. I've started to get a friend in the US to send me a reel now and again.