4G Welding – Definition, Types, and Positions

4G weld testing is a welding method that a welder may use to improve his or her talents and capabilities as a welder. The welder can now conduct groove welding, a form of welding that allows the metal to be put into an overhead posture, thanks to this certification. The 4G weld exam is a form of welding examination that allows welders to be certified.

Definition of 4G Welding

4G welding is another name for overhead position welding. Overhead welding is done from the joint's bottom. The material formed on the plate tends to fall or drop during overhead welding, giving the droplet a high head.

To solve this challenge, the liquid puddle should be maintained small, and just enough filler material should be injected to provide excellent fusion with some strengthening at the bead. Whereas if arc starts to grow, turn off the flame for a moment to allow the joint metal to flow.

The thickness of the arc may be adjusted while welding light sheets by evenly adding heat to the base material and fillers. All sides of the connection should be melted with the heat. To maintain an acceptable puddle with suitable reinforcement, enough filler material must be supplied.

The welder spark should be able to sustain the liquid metal, and tiny welding prevents the liquid steel from being burned all over the connection. A stick must be used because just a tiny puddle is necessary. It's important to keep an eye on the temperature as it passes through into the panels.

Types of 4G Welding

All of the other four positions can be applied in one of two types of welds:

Welding Fillets

A flat joint melts two metals at an exact direction perpendicular to each other and is sometimes considered the most common form of a weld.

Groove Weld

Groove Weld is a kind of welding that specializes in welding. The second most popular form of a weld is groove welds. As filler material is placed in the gap among two metal plates, a groove welding is generated.

Positions of 4G Welding

Flat Position

The flat position weld, also known as a down hand position, is the simplest and frequently the very first welding that new pupils will learn.

The welder places the materials to be connected flat on the workpiece and moves the arc over it in a downward direction.

The successful self of the joint is welded together, allowing liquid material to flow downstream into the grooves or edges.

Horizontal Position (2g)

A weld in the horizontal position is referred to as an out-of-position weld. Including the overhead and vertical then the horizontally positioned may be more difficult to master and requires more ability.

The axis of the weld is horizontal. The type of weld determines how the positioning is carried out. In which vertical and lateral pieces of steel connect at right angles, the welding arc is placed.

Vertical Position (3g)

The welding surface will be in a vertical plane while executing slot work stuff. Both the welding and its plate will be vertical in a three-dimensional surface weld.

The liquid metal streaming downhill and building up is one of the most difficult aspects of this weld. This problem can be avoided by welding in a downward or up horizontal posture.

Overhead Position (4G)

The most challenging position to weld in is the overhead position. Welding will take place with the two metal plates suspended just above the welder and the welder would have to position himself and his gear to get access to the connections.

The metal drooping from the surface might be a big concern. A crown is formed when the material sags. To prevent this from happening, the liquid metal puddles should be maintained shallow.

Tips to Pass in a 4G Welding Test

When a welder gets the 4G welding exam or qualification test, they will be qualified to work in overhead welding positions. Because welding is a simple vocation to learn but a difficult one to master, it's crucial to keep in mind that completing this examination involves just a few ideas methods and emphasizes.

With the help of these tips, you'll be able to breeze through the exam and execute this welding position with ease. It has the potential can save your career and save you from injury and damage.

  • The positioning will be identical to that of 1Gs
  • Take a seat in a position that is comfortable for you
  • Getting the most out of the rod
  • Make sure your feet are in the right place
  • Wear safety equipment

Final Note

Here in this article, we described all the types and positions that you would need to know about the details of 4G welding. So start practicing following steps of 4G welding as it is a little tough than other types of welding.

Last Updated on 2 years by Richard Boyer

  • June 8, 2022
Richard Boyer

Richard Boyer has been a professional welder for over 27 years of his life, and now he is a trainer and blogger providing critical information to anyone interested in welding. He is helping out both hobbyists, novice and professional welders to learn newer and better techniques. Read more about me

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