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Aluminum gas welding can be accomplished with gas tungsten arc welding (GTAW) and it can also be used to weld steel, as well as other metals. GTAW is also called tungsten inert gas (TIG) welding. Welding steel is one of the easier jobs when using rig welding, but there are a number of factors, which make it much harder to weld aluminum.

From cleanliness, arc length, machine settings, welding with a dirty tungsten electrode, filler rod angle, type of electrode, torch angle and size of electrode – you have to be extra-careful with all of these factors when you tig weld aluminum.

Here we go over these factors and how you have to be much more careful with aluminum than with steel.

- Make sure that the settings for your machine are correct. Set your machine to use alternating current and the high frequency switch should be at continuous mode otherwise it will make the arc stutter.

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- A piece or object of aluminum left outside is likely to be highly oxidized after having come in contact with the elements. That should be weld only after thoroughly cleaning it – otherwise it will burn or weld extremely fast.

- Arc length – it is important to keep the arc at just the correct length. Arc lengths too long or too short, both should be avoided with aluminum. Too short the length, you your metal will jump on your electrode, damaging that and you. Too long a length and the heat will not be pinpointed enough to be of proper use.

- Keep your electrode clean. A dirty electrode will make the weld sooty – taking any fun out of the job you may have been having.

- Do not use pure tungsten electrodes with the new types of tig inverters to weld aluminum. The old types could use them, but not these new ones.

- You should keep the 1/16″, 3/32″ and 1/8″ sized tungsten electrodes within easy reach when working with aluminum. With steel it is one size fits all policy, where you can go with a 3/32″ tungsten for most of the jobs. But with aluminum, you need different electrodes depending on the thickness of the aluminum.

Aluminum gas welding just needs to be done with more care than other types of welding. Keep all these factors in mind and you will have your aluminum boat repaired or your ladder fixed in the best possible manner.

Tig welding overhead is mostly a matter of getting comfortable. A few dry runs and trying different ways of holding the torch and you can settle on a technique that works for you.
Enough amperage. (125 in this vid) Sharp tungsten, good torch angle (about what is shown in the video) and a tight arc …these are the best tips for overhead TIG welding

So What Are Some of the Applications For the Gas Tungsten Arc Welding Process?

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Home Page > Home Improvement > Construction > So What Are Some of the Applications For the Gas Tungsten Arc Welding Process?

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So What Are Some of the Applications For the Gas Tungsten Arc Welding Process?

By: Jennifer Jenkins
Posted: Jan 04, 2011

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So what are some of the applications for GTAW?
Obviously, this process is used for a wide variety of applications where the parts are made out of non-ferrous metals. Maintenance and repair is done by both manual and automatic methods of Gas Tungsten Arc Welding. From stainless to titanium, aluminum, inconel, monel, cobalt, magnesium, hastalloy, you name it, and it can probobly be welded with TIG.

It is appropriate for welding of pipe and tubing in all positions. The excellent control of heat input gives maximum penetration while preventing melt-through on the root (first) pass. A lot of times a procedure is used where the root pass is welded with the GTAW process and then completed with Shielded Metal Arc Welding, Gas Metal Arc Welding, or flux Cored Arc Welding. This is used to obtain a high quality, low cost weld.

Consumable inserts are sometimes used in critical service applications. These inserts reduce porosity when alloyed with deoxidizers, improve the contour of the underside of the weld, and minimize cracking in the weld. On thin pipewall (depending on the base metal) , complete fusion is obtained without the use of filler metal. Filler metal , is used with thicker sections in order to fill the joint. Pulsed current may also be used.
Automatic circumferential or orbital Gas Tungsten Arc Welding is also used to weld pipe and tube.
Power piping, Air piping, Refrigeration piping, Chemical industry process piping, and Nuclear power piping are some of the different industries that apply the Gas Tungsten Arc Welding  process for welding pipe and tubing. Vacuum jacketed piping and pressure piping are a couple of cases where critical welding is required.

Nuclear Power Facilities :

Critical welding in the construction and repair of nuclear power facilities is required. Both manual and automatic methods are employed for many nuclear applications because of their precise control of the welding.
Pressure Vessels, Boilers, and Heat Exchangers :
Gas Tungsten Arc Welding has a wide range of applications in  the pipe and tube industry for the welding of pressure vessels, boilers, and heat exchangers. It is employed where full fusion welding is made from one side, without the use of permanent backing rings, and on girth butt welds with a smooth internal contour. Adequate mechanical strength and corrosion resistance for a particular service encountered can be obtained by choosing the correct filler metal and welding conditions.

Aerospace :

The Gas Tungsten Arc Welding process is the major welding process used in the aerospace industry. Aircraft, spacecraft, and launch vehicles are a few of what’s included in this industry. Some of the metals welded include aluminum, nickel, stainless steel, magnesium, and super alloys. Both the manual and automatic methods are employed in this industry. Pulsed current is also used extensively in this industry. Just about all critical welds made in this industry are done by TIG and a highly skilled welder.

Ships :

The Gas Tungsten Arc Welding process is applied in the ship-building industry because different materials like aluminum, molybdenum, and stainless steel are used. There is a lot of applications in this industry for the welding of stainless steel and aluminum.

Transportation :

The Gas Tungsten Arc Welding process is used somewhat in the automotive and railroad industries. It is used mainly for the welding of non-ferrous metals, maintenance, and for small components. Fabrication of aluminum fuel tanks is one application used in this industry.
In the railroad industry, several of the interior components are made of aluminum, stainless steel, monel, and copper are sometimes welded by this process. Some maintenance and repair of passenger trains is also performed.

Another area of use for this process is contractor work. If you have the equipment and skill you can charge anywhere from – 5 per hour. I personally know a person who’s company charges per hour for TIG aluminum jobs and he gets it. If you don’t have the equipment, you could always try to go to work for a contractor. TIG welding is a very rewarding profession, and they always need skilled welders.

So my advice to you is, if you want to be a TIG welder, get some training ( I recommend The Hobart Institute of Welding Technology in Troy, Ohio ) They’re the best! Maybe, if you could afford it,  get a certification in GTAW while you go to school there. Apply yourself, and learn as much as you can. Then be aggressive, and go out there and get a job in the TIG welding industry. Make sure to keep your attendance perfect, if at all possible. Employers want you to come to work and be on time. If you do this you’ll be on your way to an interesting and fun career that is rewarding.

Jennifer Jenkins

 

 

 

Jennifer Jenkins – About the Author:

Jennifer Jenkins is an expert in many niches. She would like to invite you to visit another one of her and husband Ralph’s many websites. If your interested in earning extra cash while working at home, then go to http://www.free9fastcashvideos.com and sign up to get your FREE membership and a totally FREE 9 video course on how to start an Internet Marketing business.

Source: http://www.articlesbase.com/construction-articles/so-what-are-some-of-the-applications-for-the-gas-tungsten-arc-welding-process-3967313.html

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Article Tags:
gas tungsten arc welding, gtaw, non ferrous metals, arc welding, welder, stainless steel, applications, pipe and tubing, nuclear power, filler metal

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Product Description
Provides complete coverage of the gas tungsten arc welding field. Theory, fundamentals, equipment, and safety are addressed as well as basic skill and proper procedures for a successful weld. An introduction to all of the major areas. Previous edition: c1996. DLC: Gas tungsten arc welding Handbooks, manuals, etc.

Gas Tungsten Arc Welding Handbook