Posted by 135 Fan on January 29, 2010 at 01:21:02 from (68.149.56.30):
In Reply to: Welding question posted by NCWayne on January 28, 2010 at 23:41:57:
Stick is fool proof when done by a qualified welder. MIG has too many variables. In structural welding short circuiting transfer MIG isn't even qualified. Spray transfer is but most home owners with a MIG set up don't use it as it needs high amps and is hard to use out of position. Stick puts more heat input into the steel which results in less of a quenching effect and the slag covering slows the cooling rate. Stick is slightly softer than MIG as well. You'll notice a difference when grinding welds down. Most, but not all new machinery is done by MIG or flux-core because it is faster. Factories use high end welding machines with spray transfer and pulsed spray transfer. Not many home owners have that kind of equipment. There are very few multiple pass MIG welds. I think that at least 8 out of 10 welders would rather stand behind a 7018 weld than a MIG weld. That comes from experience. On critical work like pressure vessels, MIG is only used for root passes and usually has a 7018 hot pass before being finished with sub-arc. Nozzles on vessels are usually filled up with 7018. Flux-core is starting to be used more on vessels but stick still dominates. Although the specs. look similar between MIG and 7018, if you compare them side by side, 7018 will have better as welded properties such as low temperature impact strength. I'm sure the other qualified welders on here can add more but I'd take 7018 over MIG for the strongest weld possible every time. Dave
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
