I'll add that when most metals are heated above 500ºf, there is a great tendency for the weld to cause distortion with-in the base metal.
Number one cause of weld distortion is poor joint fit up, ie; any gap larger than is needed during the weld process to control distortion, and according too AWS code, 1/8" maximum root opening allowed no matter what the welding process that is used.
On most of my open root stick and Mig certification tests I use a 3/32" land face and root opening for 90% of the common electrodes out there. This works very well to control final distortion.
The general rule of thumb to control distortion of flat plates is tack spacing of no more than 50 times the thickness of the base metal. For thin SM, I found that this rule does not work and use a small tack spaced on 1/2" to 3/4" centers with a root opening equal to 1/2 of the thickness of the base metal.
A good example would be seam welding with Tig on commercial SS counter tops and sinks while using the above method for tacking. Zero final distortion results.
Another example is a poor joint fit up on intersecting pipe joints with too much gap. After the weld is completed, there will be a lot of distortion on the longest pipe.
Can I shrink metal by welding? Yes, but only if I'm using a mis-matched filler metal. Using matched filler metal to the base metal then almost never. In 45yrs of metal working, I've learned never to say never. :)
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 - Magic Moments - by Tyler J. Woods. Magic moments don’t just happen. You have to help them along. This morning, I got up early. It is my day off from my regular workweek and I had a lot of things to do. It’s fall, and with winter coming on, there is a lot of work to do before weather closes in.
... [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.
