Some of us guys at work 48 years ago when i welded did a test on welds. We made a 4x4 cube out of mild steel. We welded fittings in it to pressure test it for leaks. Half of the seems were welded with a wire welder using CO2 gas and then the other half using argon. All of the CO2 seems leaked a small amount testing with soapy water. Argon never leaked.Your mileage may vary.
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Today's Featured Article - A City Guy's First Tractor - by Fred Hambrecht. After living in apartments in Atlanta for more years than I care to remember, the wife and I decided to move to the country. Humming "Green Acres is the place for me..." we purchased a 29 acre tract about 60 miles south of Atlanta. Next came the house, I could talk about that ordeal for another two weeks... But, I want to talk about my tractor! We didn't even own a lawnmower, and all of a sudden we had enough grass to feed all the starving children of the bovine world. Naturally, I talked
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