Generally, you should run your machine slightly cooler (about 5-10% less) than you would for flat welding. This helps the puddle freeze faster.
Three inches. Four inches. The rod burned down to a nub. He flicked it out, chipped the slag with the back of his chipping hammer, and saw it: a smooth, flat bead. No undercut. No sagging. It looked like a silver snake sleeping against the gray steel. 4g position welding
4G position welding is one of the most challenging and rewarding techniques a welder can master. Often referred to as overhead position welding, it requires a high level of skill, patience, and physical control. In the world of industrial fabrication, mastering the 4G position is often what separates a novice from a seasoned professional. Understanding the 4G Position Generally, you should run your machine slightly cooler
Welding in the 4G position presents several challenges, including: Four inches
Success in overhead welding depends on manipulating the puddle so that surface tension overcomes the pull of gravity.
In welding, the 4G position refers to an overhead welding position, where the weld is performed from the underside of a joint, with the welding gun or torch pointing upwards. This position requires a high level of skill and technique to produce high-quality welds. In this post, we'll explore the 4G position in welding, its challenges, and provide tips for mastering this critical welding technique.
. In this setup, the metal plates are laid horizontally above the welder, and the weld bead is deposited from the underside [1, 2]. It is widely considered one of the most difficult positions to master due to the constant battle against gravity [2, 3]. Core Challenges Gravity: Molten metal naturally wants to sag or fall out of the joint. You must use surface tension to keep the puddle in place [4]. Safety: Sparks and hot slag fall directly toward the welder. High-quality PPE—including a leather cape, bib, and respirator—is non-negotiable [4, 5]. Visibility: Maintaining a clear line of sight while positioned underneath the workpiece can be awkward and fatiguing [5]. Technical Execution Workpiece Setup: The plates are placed horizontally with a gap (groove) between them. They are typically secured in a jig or overhead rack [1, 2]. Amperage Settings: Generally, you’ll want to run slightly "colder" (lower amperage) than you would in a flat (1G) position [4]. A cooler puddle freezes faster, reducing the risk of the metal dripping [4]. Electrode Angle: Hold the electrode at a