Welding Handbook Pdf

TIG Welding ProcessAs needed, filler metal is added by hand into the weld puddle. Some welding machines have a pedal to control the heat, whereas other machines will have a fingertip remote on the torch. TIG welding is a two-handed process., making it a more difficult weld.You can break down the process of TIG welding to three fundamental things:. Heat. Shielding. MetalThe heat comes from the tungsten electrode, through the torch to create an arc to the metal in question.

1. Welding Handbook 10th Edition
2. Aws Welding Handbook Pdf

The shielding gas is released from a compressed container to the area where the weld is occurring and protects the weld from the air. The welder has to dip the filler metal into the arc by hand to weld with it.TIG is also known as GTAW welding (gas tungsten arc welding). It is used to weld thin sections of such as copper alloys, magnesium, and aluminum. It is also used to weld thin stainless steel. TIG vs MIG WeldingTIG is a process that gets the heat needed for welding from an electric arc that occurs between the part to be welded and a non-consumable tungsten electrode. If a filler metal is needed, it is fed into the weld puddle.MIG (also called GMAW) is a process where metals are welded by heating them with an arc between the part to be welded and a continuously fed filler metal. (2) TIG Welding JobsThe average wage for a TIG welder is $18 per hour in the US, and the profession is only projected to grow in demand.

With the job outlook expanding 4% by 2024, skilled welders with proper training are predicted to have excellent job opportunities over the next decade according to the Bureau of Labor Statistics.If you’re familiar with MIG welding but haven’t dived into TIG, the differences are few, but enough to make TIG a bit harder and more expensive. This article talks about the history of TIG welding, what it is best used for, how it is done, job training, and more!

HistoryHumans have been welding since 1000 BC as ancient civilizations started shaping copper, bronze, gold, and other metals. Basic welding technology remained nearly the same for centuries until the Industrial Revolution in the 1700 and 1800s. Welders took notice of blacksmithing techniques and forge welding emerged as a popularized form.

With this method, heated metal was used to join two pieces of steel or other metals. Forge welding was the beginning of welding as we know and understand it today.In 1941 TIG welding was invented and patented by Russell Meredith who worked for Northrop Aircraft. He wanted a system that would help produce strong welds for lightweight aircraft materials. Meredith originally used Helium shielding gas and a tungsten electrode, but his patent only specified that an “inert gas” and “refractory” welding electrode be used for this kind of welding.TIG welding was born out of the need to weld with thinner materials such as aluminum to support aircraft production during WWII. ApplicationsTIG welding is mostly used for working on thinner gauge materials that require delicate welds. While TIG is a bit slower than MIG, it is by far the most versatile welding processes as it can be used to weld almost any material in a variety of positions. With the ability to join metals like aluminum, titanium, stainless steel and other exotic alloys, it is ideal for auto repair, construction, and metal art.TIG welds are often used to build fences, bike frames, attach fenders, repair pipes and create ornamental pieces.

TIG welds often have a very aesthetic finish that lends itself to creative exploration. The process’ ability to produce strong, precise welds on lightweight materials has helped lower fuel consumption and costs by cutting the weight of cars and trucks significantly. Keep Torch 1/8″ from Surface of the Metal Being Welded. Lean torch away from the direction of weld 15 to 20 degrees. TIG Tungsten Electrode With Pink Gas Lens.

The Lens Comes In Different Sizes and Helps To Improve Coverage and It Keeps The Gas Around the Weld Puddle Difficulty Level, Advantages, and DisadvantagesThere is a steep learning curve for TIG welders, and it is not recommended as an entry-level welding process. What makes TIG so tricky? Using both hands at once to simultaneously control the torch while feeding the filler metal into the joint can be tough to get the hang of for novice welders. It takes a lot of hands, eye, and foot coordination, which requires a lot of practice to master.While MIG is undoubtedly the best place for beginners to start, don’t let the difficulty of TIG discourage you from trying. Also, Stick and TIG are both CC and most of the TIG machines have settings for both. With proper hands-on training in the classroom and quality apprenticeship programs, any experienced welder should be able to eventually tackle TIG.

Before running out to purchase a pricey TIG welder, it might be best to attend a community college or vocational school class to see how you take to it.The three keys to TIG Welding application issues are:. Torch angle. Filler material angle. The torch melts the base material and the molten base material melts your filler rodTIG Welding Video BasicsPulse for TIGPulse for TIG is controlled by either a petal or by setting up the pulse.

The purpose of the pulse for TIG is to:. Moderate the heat when welding thin metals. Makes it easier to create a clean weld, particularly when moving the puddle forward. Helps you minimize movement in tight spaces without introducing too much filler or heatPulses range from 20 per second to 150 per second.

Welding Handbook 10th Edition

Higher pulses enable you to neatly weld in less time while slow pulsing might help a welder with a slower rhythm while welding. Bottom line is that TIG pulsing can help with accuracy and control.

Stainless SteelIf you are having problems with TIG Welding Stainless Steel the problem is probably too much heat. Stainless steel doesn’t transfer heat as quickly as other metals, sometimes causing warping.The solution to heat-related TIG stainless steel welding problems to increase the travel speed and reduce the amperage. Another approach is to reduce the diameter of the filler rod.

Available in a freeEbookConclusionThe demand for will only grow in the coming years, so now is the time to expand upon your welding experience and learn how to TIG weld. Now that you understand the processes’ rich history, general uses, and the difficulties you may face while learning, you can find an accredited educational program near you and start learning.The versatility and precision of TIG welding are truly unbeatable.

Aws Welding Handbook Pdf

Becoming a skilled TIG welder can help you conquer any project around the house and shop, no matter the material. Or it can serve to make you an invaluable member of a company.

Author BioGreg Sanders is the owner of, a website devoted to all things welding. Greg is semi-retired from welding but likes to keep learning, as well as sharing his knowledge through his website.

You can also find him on. References(1) Temperature Controlled TIG Welding Micro Precision Welding, accessed August 21, 2017(2).