Characteristics of MIG/MAG welding wire:
Welding is a repair technique that involves applying a welding layer to the surface of an object to restore its original dimensions or increase its resistance to wear. In the welding process, the wire is gradually fed into the welding zone, and as the layer cools, it forms a hard and durable coating.
The advantage of welding wire is that it provides austenitic steel with increased resistance to intergranular corrosion. Although other types of wire can also be used for welding, it is ideal for repairing and regenerating parts. They gain resistance to harsh conditions such as high temperatures, pressure, or corrosion.
Welding wire is used in many sectors of industry, applied for the regeneration of shaft axes, gears, flanges, as well as various types of tools and machines. It is also often used to reinforce welds exposed to high temperatures or corrosion.
Types of MIG/MAG welding wires:
SG2 (G3Si1): Universal wire for mild steel, popular in workshops.
SG3 (G4Si1): Higher silicon and manganese content, providing greater joint strength, especially recommended for contaminated steel.
ER70S-3: For clean, oil-free mild steel.
ER70S-6: For contaminated mild steel, with a higher content of deoxidizers.
Wires for stainless steel: e.g. ER308LSi, ER316LSi.
Self-shielded wires: Generate shielding gas during welding, do not require external shielding gas.
- Flux-cored wires: Contain flux that generates shielding gases during welding.
Applications of welding wires:
- Repair and regeneration of worn machine elements, such as rollers, blades, gears.
- Welding of surface layers that increase resistance to wear, impacts, corrosion.
- Welding of surfaces exposed to friction, impacts, erosion.
- Welding of protective layers on elements exposed to corrosion in aggressive environments.
The choice of the appropriate wire depends on:
- The type of material to be welded.
- The required joint strength.
- Working conditions (e.g., presence of wind, contaminants).
- Welder's preferences.
