| Property | F1 (Flat) | F2 (Horizontal) | F3 (Vertical) | F4 (Overhead) | |----------|-----------|----------------|---------------|----------------| | Gravity effect | Helps | Neutral/slight pull | Puddle wants to fall | Fights welder | | Deposition rate | Highest | High | Medium | Low | | Skill required | Low | Medium | High | Very high | | Fatigue level | Minimal | Low | Moderate | High | | Typical electrode size | Large (5/32”) | Medium (1/8”) | Small (3/32”) | Small (3/32”) | | Common defects | Slag, LOP | Undercut, sagging | Roping, lack of fusion | Dripping, burn-through |
F1 is the first position taught in welding schools. It allows students to focus on their hand-eye coordination, arc length, and travel speed without the complexities of body positioning required for vertical or overhead welds. f1 welding position
You will find F1 welds in almost every industry that uses metal: | Property | F1 (Flat) | F2 (Horizontal)
The F1 position, universally recognized as (1G for grooved welds, 1F for fillet welds), is the most fundamental position in the trade. Under ISO 6947, it is designated PA . Gravity works with the welder here: the workpiece lies horizontally, and the welder deposits metal from above, allowing molten puddle to settle naturally. Under ISO 6947, it is designated PA
