Description of welding wires for black steel TIG:
- ER70S-2:
Versatile wire, recommended for applications requiring high-quality welds, e.g., in the aerospace industry.
- ER70S-6:
Wire with the addition of deoxidizers, allowing for welding of slightly rusty or contaminated surfaces.
- 12.64 (W4Si):
Solid wire, characterized by high weld strength and low sensitivity to contamination. Often used for welding structural steel, shipbuilding, boiler steel, and fine-grained carbon-manganese steel.
- SG2:
Used for welding most steel components.
- SG3 (G4Si1):
High-quality solid wire, used in the automotive, machinery, shipbuilding industries, as well as in the production of steel structures and pressure vessels.
Recommendations for wire selection:
For thin sheets, wires with a smaller diameter (1.0-1.2 mm) are used, and for thicker ones - wires with a larger diameter (2.0 mm and more).
If the material is contaminated, it is worth choosing a wire with the addition of deoxidizers (e.g., ER70S-6).
Weld quality requirements:
For high-quality requirements, wires such as ER70S-2 are recommended.
For weaker welders, thinner wires are recommended to avoid overheating.
Typically, a wire with the same chemical composition as the welded material is used.
Additional tips:
When choosing a wire, it is advisable to follow the principle that thinner wires are better for thinner materials.
A wire with a larger diameter is better for filling larger gaps.
It is worth using welding tables that help in selecting the appropriate wire for a specific application.
In case of the need to choose the best wire for TIG welding, one should consider several factors related to both the welder's parameters and the non-consumable electrode, as well as primarily the type of welded material.
