Filler Metal Selection for Undercut Prevention
Proper filler metal selection reduces undercut by providing adequate deposition rates and good wetting characteristics to fill the groove melted by the arc. Match filler metal composition to base material and choose appropriate wire diameters for the application.
Filler Metal Strategy
- Select appropriate wire diameter. Larger diameters provide higher deposition rates to fill undercut-prone grooves.
- Match composition properly. Ensure filler metal wets well with the base material for good fusion and fill.
- Consider deposition efficiency. Higher efficiency wires provide more filler metal per amp for better groove filling.
- Optimize for position. Choose filler metals with good positional characteristics for overhead and vertical welding.
Wire Selection Guidelines
- For thin materials: Use smaller diameter wires (0.8mm) for controlled deposition and heat input.
- For thick sections: Larger wires (1.2-1.6mm) provide higher deposition rates to fill wide grooves.
- For positional welding: Choose wires with good arc characteristics and controlled penetration.
- For critical applications: Use low-hydrogen, high-quality wires with consistent composition.
Complete System
CORGON® 18 + Quality Filler
Optimized PerformanceWhy gas and filler work together: CORGON 18 provides the optimal shielding environment for quality filler metals to perform at their best, ensuring good wetting, minimal undercut, and consistent mechanical properties.
System approach: Combine quality shielding gas with properly selected filler metals for the most reliable undercut prevention across all welding positions and material thicknesses.
⚙️ System Optimization Required