May 9th, 2008 
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There are so many different grades that things are made of and it is not always clear which one you are about to weld.
So why is cast iron so troublesome to weld? Because it has a metric ton of carbon in it.
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solid iron contains over 2 p.c carbon and often up to four %. When that much carbon is present in iron, it toughens easily. But all that carbon serves a purpose… It turns into graphite and that actually serves a purpose as a lubricator on cylinder walls of a combustion engine. But for welding, all that carbon and graphite is horrible. Carbon in those pc.s cause toughening of the weld metal and surrounding heat affected area.
It does not bend, it breaks. It may be good for engine blocks, but it is unpredictable under load.
Have you ever lit up on a heavy aluminum casting using straight argon gas and had to wait a really long time to even get a puddle? Not so when you add helium. You get a pool instantly and it’s even a cleaner puddle… An extra bonus.
But I am telling you that when you use an argon helium mix, I will be able to bet you won’t want to use straight argon again excepting actually thin aluminum sheet.
Be careful not to use too much torch gas. Simply to be clear, that’s the gas leaving the tig cup.
Enough is enough and more is worse, not better. Use just enough flow to shield the puddle and not much more.
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Watch the video related to tig welding
Learn how to tig weld. www.weldingtipsandtricks.com The filler wire hand is a slow learner. It is the speed bump in the parking lot of tig welding. Learn how to feed that tig rod and you can learn to tig weld better and faster. For more tips like this, visit www.weldingtipsandtricks.com
Help answer the question about tig welding
If you can do mig welding can you more the likely do tig welding?My fiance has been doing "mig" welding for about 3 years now. He just got laid off and someone called him about a new position BUT they do "tig" welding, he isn't too sure what the difference is or if he is going to fail the test they give him for tig welding. Is there a big difference?
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newbie TIG welder.. thanks for the video
You are welcome. Check out my site for more stuff.
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What you have to your advantage is being able to Oxygen- Acetylene weld. You need to be able to use both hands. One to manipulate the TIG Torch and the other hand to feed and dip the filler wire. Good Luck !
Here are some basics
Gas Tungsten Arc Welding (GTAW) is frequently referred to as TIG welding
benefits:Superior quality welds
Welds can be made with or without filler metal
Precise control of welding variables
Free of spatter
Low distortion
A Mig welder is a wire welder with a mig outfit it uses a sheilding gas mig is also know as Gas Metal Arc Welding (GMAW) most robotic welder are mig and they are easy to use
Benefits:All position capability
Higher deposition rates than SMAW
Less operator skill required
Long welds can be made without starts and stops
Minimal post weld cleaning is required
Stick welding and arc welding are the same
Shielded Metal Arc Welding (SMAW) is frequently referred to as stick or covered electrode welding. Stick welding is among the most widely used welding processes.
the only down side is it makes so much heat that it makes the metal brittle
benefits:Equipment used is simple, inexpensive, and portable
Electrode provides and regulates its own flux
Lower sensitivity to wind and drafts than gas shielded welding processes
All position capability
downside is it makes the metal brittle, its porious, cracks, and produces alot of slag
I highly suggest a MIG welder or just a plain wire welder very easy to use not that cheap you can get a good Lincoln for a few hundred
And i suggest a lincoln over a Miller
If you have some experience with mig welding it will be easy enough to pick up. If your decent with a stick and are comfortable watching the bead form as you weld then it shouldn't be a problem either. The one thing about tig is learning how to watch your bead flow and your heat settings. I do alot of tig work on stainless tubing and on metals that are case hardened. I had a real good instructor in a machine shop show me. It easy to learn the basics from a welding class, it just takes some time to get your own technique down.
i went there but left shortely after cause what i wanted to do required more schooling after that. they never told me that when i was looking into it. i went to the job corps in la. jsut look into it and plan it out. make sure it all fits.
Great job giving a clear explanation & bursting the bubble for some of those folks making it sound like you need a 10 year internship to learn the basics. (maybe that’s what they needed though)
ROFL on the kermit comments !! I didn’t read them until after watching the video and only then it occurred to me.
It should not take you very long at all since you are already certified as a TIG welder. Getting certified will require a certain number of hours training and taking a test of course, but you should not have any trouble doing it.
On your first try, you will probably lay a better bead than I ever did.
Doc
Tig welding is a good choice for aluminum welding. It will give you the best quality and the best aspect of the weld. Aluminum oxide is a big trouble maker while welding aluminum. The only welding process that deals with the aluminum oxide by eliminating it during the process is the TIG welding using argon gas. There is only one negative aspect of TIG welding: productivity. If you don't plan welding a lot with the welder and efficiency is not an important aspect of you activity then TIG is the way to go.
An important feature of the TIG welder would be high frequency arc ignition without contact between the electrode and the work piece. It will help preserving the electrode and have wolfran invlusions in the weld
Thank you! It is nice to see all the comments on this video. I am feeling a lot more comfortable in my “teacher” role. Please check back often, I update about once a week.
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thanks for the video!
Great video
Question for you. I am getting into motorcycles/motorcycle fab work.
For this type of purpose, which type of welding it better to learn/use…MIG or TIG?
Nice video. All the other ones are like “OMG THIS IS WAY TOO HARD FOR YOU TO TRY BUT HERE LET ME SHOW YOU”..insert flash of light from welder with no mask over the camera so you cant actually see anything..
…”DONE!1!”
Sounds good man,
i am going to be taking some welding courses in the new year…
So i am sure that i will have a whole bunch more questions for you then!
again, thanks for the input
Well.. if I had to pick one I would say the TIG. It would give you a wide range of welding options from steel to alum. Just be careful of the electronics on the bikes. The high frequency from the arc starting can fry computers. Disconnect the battery before welding and keep the ground clamp as close to the weld as possible.
Thanks for posting and don’t forget to visit my site. You can sign up for the newsletter and stay in touch. I update about once a week so check back often.
any one you want is good