| Defect | Cause | Remedy | | :--- | :--- | :--- | | | Excessive amperage or incorrect travel speed. | Reduce amps; pause slightly at the sides of the weave. | | Slag Inclusion | Not cleaning inter-pass slag; improper manipulation. | Grind between passes; maintain proper arc length. | | Overlap | Travel speed too slow; low amperage. | Increase travel speed; ensure arc force pushes metal into joint. | | Sagging Puddle | Amperage too high; arc too long. | Lower amps; keep electrode tip almost touching the puddle. |
In the 4G position:
Due to the nature of the overhead position, safety is paramount: 4g weld test
| Pass | Electrode | Amperage Range | Voltage (Approx) | Travel Speed | | :--- | :--- | :--- | :--- | :--- | | | E6010 / E7018 | 85 – 100 Amps | 20 – 22 V | Slow/Medium | | Fill | E7018 | 100 – 125 Amps | 21 – 23 V | Medium | | Cap | E7018 | 100 – 120 Amps | 21 – 23 V | Medium |
In conclusion, the 4G weld test is a critical assessment of a welder's skills and abilities, ensuring that they can produce high-quality welds in the overhead position. By understanding the test requirements, practicing regularly, and developing a consistent welding technique, welders can prepare themselves for success in this challenging test. | Defect | Cause | Remedy | |
To pass the 4G weld test, welders must meet specific requirements, including:
Welding overhead is difficult because . Common defects include: | Grind between passes; maintain proper arc length
The 4G overhead welding test is widely considered one of the most difficult welder qualification tests due to the physical demands and the need to combat gravity. Success requires a combination of correct machine settings (lower amperage), precise body positioning, and steady hand-eye coordination.
This write-up is based on common industry standards (AWS D1.1/D1.5). Always verify specific parameters and acceptance criteria with your certifying body or employer.