January/February 2007 issue cover

Practical Welding Today January/February 2007

Practical Welding Today was created to fill a void in the industry for hands-on information, real-world applications, and down-to-earth advice for welders. No other welding magazine fills the need for this kind of practical information.

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Aluminum Workshop: Electrical current in TIG and MIG

December 11, 2014 | By Frank Armao

Q: When I gas tungsten arc weld (GTAW) aluminum, I always use alternating current (AC), but when I gas metal arc weld (GMAW) aluminum, I always use direct current electrode positive (DCEP). Why the difference? Does anyone GTAW aluminum using DC? Does anyone GMAW using AC? A: In both GTAW and GMAW,...

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Arc Welding 101: Preheating a shaft-sprocket assembly

February 13, 2007 | By Paul Cameron

Q: We are welding 1018 cold-rolled, 2.5-inch-diameter shaft to a sprocket made from 1045 steel. We preheat the shafts to about 200 to 250 degrees. We are having some failure of the shaft, and I'm wondering what the proper procedure is for welding the assembly together. The sprockets are welded...

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GTAW welder

Seeing GTAW through a new lens

January 9, 2007 | By Mike Sammons

Not every welder uses a gas lens on his or her GTAW torch, but gas lenses should be considered for a variety of applications and for several reasons. Knowing what a gas lens does, how to choose one, and how to install and take care of one are critical to getting the most benefits out of it

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Autodarkening helmet

Benefits of autodarkening helmets come to light

January 9, 2007 | By Derek Baker

Autodarkening technology has established a firm place in the welding industry not only as a piece of equipment that provides excellent protection, but also as a means to improve welding performance.

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Effects of shielding gas

7 effects of shielding gas

January 9, 2007 | By W.F. Garth Stapon, Kevin Lyttle

Depending on your application, various components of your shielding gas blend can help or hurt you. Find out what effects shielding gas has on your weld and what you can do to get the best results.

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