The Lincoln Electric Company

Frank Armao

Contributing Writer
The Lincoln Electric Company
22801 St. Clair Ave.
Cleveland, OH 44117


Phone: 216-481-8100
fax: 216-486-1751
www.lincolnelectric.com
Contact via email
He is a member of the AWS D1 Committee, chairman of the AWS D1 Aluminum Subcommittee, and vice chairman of the AWS D8G Automotive Aluminum Arc Welding Committee.

Weldable and unweldable aluminum alloys

May 11, 2011

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Frank Armao discusses which aluminum alloys are weldable, which are not, and why.

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Achieving T6 designation for 6061

March 14, 2011

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Can you tell me the heat treatment steps necessary to produce 6061-T6? I have heard that heat treating it after welding will increase its mechanical properties.

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Age before welding in T6

March 24, 2009

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Frank Armao discusses why weld strength increases when incorporating an aging cycle prior to welding in the T6 temper.

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Preventing porosity in humid environments

March 11, 2008

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I'm having problems with excessive porosity when TIG welding aluminum. My friend says it comes from water vapor in the air (it's very humid here) being broken down by the arc. Is this true? It sounds pretty far-fetched.I hope you didn't bet on this one. If you did, get ready to pay up. All porosity...

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Eliminating fine shavings from 5356 wire

January 15, 2008

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I've been using my welding equipment to weld aluminum with 4043 filler for a long time without problems. Now that I have a project that requires me to use 5356 filler, I'm having problems with fine shavings that come off of this particular wire. Eventually they clog the torch liner so that the wire...

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Minimizing weld cleaning stripes

September 11, 2007

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Frank Armao gives advice on how to minimize the appearance of cleaning stripes on polished aluminum tread plate.

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To weld or not to weld Alclad

July 10, 2007

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I have some aluminum sheet that I would like to use to fabricate a project. The only marking on it is "Alclad." Other than that, I have no idea what alloy it is. Can you tell me what filler metal to use to weld it?Whether you realize it or not, you have seen Alclad sheet hundreds of times. The...

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Aluminum Workshop

May 8, 2007

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I have a fabrication project involving 5454 aluminum plate, and I was told to weld this alloy using 5183 filler wire. Is this correct?

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Which filler wire is best for welding 6061-T6 aluminum, 5356 or 4043?

October 3, 2006

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Both are acceptable for welding 6061-T6, but each has advantages and disadvantages depending on the application.An aluminum alloy containing 5 percent magnesium, 5356 generally is stronger and more ductile than 4043. But 4043, which contains 5 percent silicon, typically flows better, is more...

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Choosing a GMAW machine for occasional aluminum welding

September 25, 2003

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I want to buy a small gas metal arc welding (GMAW) machine, preferably one that runs from 120-V input power. Most of my welding will be steel, but I would like to weld aluminum occasionally. Can these machines really weld aluminum? I've heard a lot of different opinions. Some companies claim their...

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Inverter versus transformer power supplies for aluminum GTAW

August 28, 2003

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I'm looking for a new GTAW power supply for AC aluminum welding. I had intended to buy a conventional transformer unit, but several people have told me to buy an inverter-based power supply. Which one is better for my application?Inverter-based power supplies do have some advantages over...

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Welding aluminum with inverter-based power supplies

July 24, 2003

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It's easy to look at such a long-established technology as welding and believe that little or no technology development is taking place. In truth, however, the capabilities of welding power supplies are changing constantly and rapidly, especially in the area of inverter technology. These power supplies are suitable for welding aluminum alloys, including thin aluminum alloys.

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Al GMAW: CC or CV?

June 12, 2003

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For about 40 years, a great debate in welding is whether to use constant-current or constant-voltage power supplies when using gas metal arc welding on aluminum. Constant-current power supplies made sense 30 years ago and are still used in some applications today, but for most applications, constant-voltage power supplies are suitable for gas metal arc welding aluminum.

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How to recognize, minimize weld smut

April 10, 2003

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When I weld any aluminum alloy, I see a covering, light gray to black in color, over the weld. I see it when I gas tungsten arc weld (GTAW), but it's worse when I gas metal arc weld (GMAW). What is it? Does it affect the mechanical properties of the weld? How do I get rid of it?A common occurrence...

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Choosing tungsten electrode type, size for aluminum GTAW

February 27, 2003

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I've heard different opinions about which size and type of tungsten electrode I should use to gas tungsten arc weld (GTAW) aluminum. Could you clear up this subject for me?As you know, we use direct current electrode negative (DCEN), or straight polarity, to weld steels and stainless steels. For...

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