TIG Welding / Manufacturing / Metal Fabrication / MetalWorks Fabrication

TIG Welding

Gas Tungsten Arc Welding (GTAW) is more commonly known as Tungsten Inert Gas (TIG) welding. Although technically incorrect. Old timers still call in Heliarc due to Helium being used as the shielding gas. Helium is an inert gas and was originally used when TIG was developed during the 1940’s. Helium is still used in specialty applications. Today Argon is the gas of choice, mainly due to cost.

TIG is the most versatile kind of welding there is. You can weld 4130 chromoly, mild steel, stainless steel, tool steel, copper, nickel alloys like inconel and hastelloy, aluminum, magnesium, and titanium. TIG welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas, and a filler metal is normally used. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma. AC current is used for welding Aluminum and Magnesium. DC current is is for most other metals.

The above is an example of a TIG weld on Aluminum. A TIG weld has a very neat appearance and if done correctly should end up shiny. The weld nearly looks as if it were a row of coins.

An example of a copper TIG weld.

This is a complex joint in steel and the result is why I use TIG welding extensively on projects that we do. TIG welding is like playing the guitar, anyone can pick it up and make it work but to be proficient at it you must practice, practice, practice! Got questions? Feel free. I’ll be happy to help.

As always, we would be more than happy to discuss your Metalworks project from the biggest of BIG to the smallest of small.

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TIG Welding / Manufacturing / 4130 Chromolly Steel Tubing / Metal Fabrication

AISI 4130 N CHROMIUM MOLYBDENUM (chromolly) STEEL TUBING – Part 2

Kinds of StrengthStrength is the ability of a metal to withstand some kind of force without breaking down. For example a metal can resist failure from pulling, hitting, pressure, repeated bending, twisting or shearing. These strength properties are known as, respectively, tensile strength, impact strength, compressive strength, fatigue strength, torsional strength, and shear strength. In my experience tensile strength is the most commonly “advertised” although not necessarily the most useful.

The minimum Ultimate Tensile Strength for 4130 (Chromoly) Normalized Alloy Steel is 97,200 psi. A513 (alloy 1020-1026) Steel alloy is generally used for DOM tubing. A popular choice for our type of fabrication has a Ultimate Tensile Strength of psi 87,000. Fabricators and engineers use 4130 because they can use a thinner wall thickness tubing to get the required strength. Thinner equals lighter, lighter equals performance.

Posted by Scott LePage at 16:39 0 comments Links to this post

Labels: 4130, A513, AISI, alloy 1020-1026, Chro-Mo, Chrome-Moly, CHROMIUM MOLYBDENUM, Chromoly, DOM, Fabricators, impact strength, steel tubing, tensile, torsinal strength, welding, www.metalworksfab.com

As always, we would be more than happy to discuss your Metalworks project from the biggest of BIG to the smallest of small.

Contact us today to discuss your Metal Works needs….

Ph: 704-662-5280
Email Us

www.metalworksfab.com   

http://www.linkedin.com/in/scottlepage

www.metalworksfab.blogspot.com

www.metalworksfab.wordpress.com

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Previously we learned what 4130 N Chromolly is. Next we will answer the question, Why is it such a popular choice? Fabricators and engineers use 4130 tubing because of its outstanding strength, forgoing mild steel, where a thicker wall must be used to have equivalent strength as the 4130 chromolly steel tubing. Simply put it is stronger. “Stronger”? What does that mean?

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