Structural aluminum is usually welded with 5356. Cast aluminum is usually welded with 4043. For non critical applications these two wires are often interchangeable. There are some other less popular grades of welding wire for specific applications but if you can't decide between 4043 and 5356, get some of the new Maxal 4943 wire. It's the cat's azz according to a guy I know who specializes in aluminum welding. Wets out better than 4043 and basically welds like 4043 with the higher strength of 5356. Check the specs. to see if it is recommended for 5000 series aluminum.
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Today's Featured Article - Talk of the Town: How to Crank Start a Tractor - by Staff. This interestin discussion is from the Tractor Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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