Welding is an intricate process that requires a lot of practice and skill to master. According to an American Welding Society survey, 4G welding position is one of the most common and popularly used welding positions. 4G welds involve welding in a flat position with the workpiece in a horizontal position and the welding torch pointing down.
This position is used to create butt joint welds as well a wide variety of other welds. On average, 4G welding is approximately 80% stronger than 3G welding, making it the preferred welding technique for structural welding jobs.
So, what is 4G Welding position? Let us take a closer look.
What is 4G Welding Position?Welding is defined as the process of joining two pieces of materials, often metals or thermoplastics, together. It is usually done by bonding materials at high temperatures.
4G welding position is one that requires good skills and accuracy for successful welding.
Definition of 4G Welding Position4G welding position or Groove weld, is the technique of welding where the weld axis and the face of a joint are at an angle of 45 degrees from the horizon line.
It is also known as a horizontal groove weld or the flat position welding. The components of 4G welding position require a face angle, root opening, groove angle, and throat size. All of these must be made according to the welding specs and standard thickness of the two materials that are going to be bonded together.
Advantages of 4G Welding PositionThere are several advantages to 4G welding position as it is an efficient and accurate technique:
- The welds created with this position require little or no cleanup as the welder can move the torch with ease while it is at the 45-degree angle.
- Because of the angle, welders get more control over the entire welding process.
- The accuracy of the weld is better as the joining of the materials is very precise.
- The strength of the completed weld is also better.
Disadvantages of 4G Welding PositionAs with any welding technique, there may be a few drawbacks to the 4G welding position:
- It requires skill, experience, and proper equipment to use 4G welding technique in order to get an accurate and precise weld.
- Since the angle of the torch is 45 degrees, it is difficult to maneuver the torch and can increase the risk of inaccurate welds.
- The welds created in this position are prone to cracking if adequate cooling time is not given.