The "4" indicates the vertical position (think of a wall), and the "F" stands for "Fillet" (a triangular-shaped weld joining two pieces at a right angle). In this position, the welder deposits metal onto a vertical plate to join it to another plate, typically horizontal or also vertical.
| Position | Code | Weld Type | Difficulty (1-10) | Gravity Effect | |----------|------|-----------|------------------|----------------| | Flat | 1F | Fillet | 2 | None (puddle stays) | | Horizontal | 2F | Fillet | 5 | Moderate (sagging on vertical leg) | | Vertical | 3F (vertical groove) | Groove | 8 | High (falling puddle) | | | 4F | Fillet | 7 | High (puddle sags down) | | Overhead | 4F? No – overhead fillet is 4F? Wait correction: Overhead fillet = 4F ? No – overhead fillet is 4F ? Check: AWS: 1F=flat fillet, 2F=horizontal fillet, 3F=vertical fillet (groove? No – 3F=vertical fillet actually? Let’s clarify: AWS: Positions for fillet welds: 1F flat, 2F horizontal, 3F vertical, 4F overhead. So 4F is overhead ?? Important correction: |
The cohesive forces within the liquid metal hold the puddle together and keep it attached to the base plates. 4f welding position full
: Utilize a foot pedal or torch-mounted amperage control to actively back off the heat if the puddle becomes too wide.
A long arc increases voltage, widens the puddle, and reduces arc force. Maintain a very tight arc length (roughly equal to the diameter of your electrode core wire). A tight arc uses the physical force of the arc stream to push the molten metal up into the root of the joint. 3. Electrode & Torch Angles The "4" indicates the vertical position (think of
Not all welding processes are created equal for overhead work.
This article provides a full, deep dive into the 4F welding position—covering its definition, techniques for different processes (SMAW, GMAW, FCAW), common defects, troubleshooting, and certification tips. No – overhead fillet is 4F
Maintain a consistent, moderate travel speed. Moving too slowly will cause the puddle to become too large and sag.