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Nead help/advice on welding.

 
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Old 02-21-2008, 09:24 PM
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Nead help/advice on welding.

Ok... so here's the deal: A friend of mine is going to do a clutch/flywheel/main seal install for me for free if I weld his stainless steel universal cat up for him.

I have 3 years of experience in welding, but not much experience with stainless, and I'm not certified and I never went to school for it, so I need a little help/advice.

I used to work for a catalytic converter manufacturer, and I'm positive that we used to weld stainless steel with ESAB MIG welders, some stainless steel wire, and some tri-gas (helium, argon, oxygen blend)...

However, someone told me today that I can't MIG weld stainless even with stainless wire and tri-gas, because the MIG welder will not generate enough heat to properly penetrate the stainless steel. I've also read that to properly MIG weld stainless you need a pulse spray arc mig welder, which I do not have access to (but I'm pretty sure the ESAB MIG welders I used at the manufacturer were not pulse spray welders either...)... so I need someone to tell me the real deal.

Unfortunately, I don't even know what kind of welder I'll be using, because I don't own one myself, and the kid I'm doing this for is gonna borrow one off of a friend of his... I'm assuming it's gonna be a standard 120v snap-on mig welder or something similar... I doubt it's gonna be industrial 240v stuff.... And before anyone says anything... no I don't have access to a TIG welder...

I do, however, have access to a 240v stick arc welder at the shop where I work now... Would it be possible with this if not the MIG welder??

Help please... i want a free clutch install! =P
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Old 02-22-2008, 01:03 AM
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i dont know to much all i ever done was back country welding but i do know google i hope it helps

These steels are slightly more difficult to weld than mild carbon steels. The physical properties of stainless steel are different from mild steel and this makes it weld differently. These differences are:

* Lower melting temperature,
* Lower coefficient of thermal conductivity,
* Higher coefficient of thermal expansion,
* Higher electrical resistance.

http://www.azom.com/details.asp?ArticleID=1178

http://www.lincolnelectric.com/knowl.../migweldss.asp

http://www.key-to-steel.com/Articles/Art97.htm
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Old 02-22-2008, 03:33 AM
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Dude.. thank you. That is SUPER helpful. I could only find the second article... the lincoln electric one... when I searched earlier... The first and third article you have listed help a bunch... I'm really glad I read that because the guy i work with is apparently a retard... I knew that he was wrong but he had me second guessing myself lol... rep for j00!
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Old 02-22-2008, 04:16 PM
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I IS HELPING FREE clutch flywheel and main seal
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