Whether it's a large professional production line in a factory or on-site processing projects involving steel welding, professional welders are required to use specialized welding techniques and reliable welding materials to connect steel. Especially in the processing and welding of refined steel curtain wall profiles in factories, it is essential to ensure not only high welding strength but also the aesthetics and straightness of the weld joints. Next, let's take a look at how to select steel welding materials.Gas shielded welding wire?

1. Select gas shielded welding wire based on the structural steel to be welded.

For carbon steel and low alloy high strength steel, the selection of gas shielded welding wire should mainly follow the principle of equivalent strength matching to meet mechanical performance requirements. For heat-resistant steel and weathering steel, the consistency or similarity of the chemical composition between the weld metal and the base material should be considered to meet heat resistance and corrosion resistance requirements.

2. Based on the quality management requirements of the welded components (especially for impact and toughness).

The selection of gas shielded welding wire is related to welding conditions, slope shape, protective gas mixture ratio, and other process conditions. While ensuring the performance of the weld joint, welding materials should be selected to achieve welding efficiency and reduce welding costs.

3. Based on the on-site welding position.

Select a diameter corresponding to the thickness of the workpiece to be welded.Gas shielded welding wireDetermine the current wire value being used, refer to product introduction materials and experiences from various manufacturers, and choose a suitable gas shielded welding wire number for the welding position and current used.

4. Self-shielded flux-cored wire.

Self-shielded wire refers to a type of wire that can perform arc welding without additional protective gas or flux, thus obtaining qualified welds. Self-shielded flux-cored gas shielded welding wire contains powders that serve as slag-forming, gas-generating, and deoxidizing agents within the steel sheath; during welding, these powders turn into slag and gas under arc action, providing slag formation and gas protection without needing additional gas protection.

The deposition efficiency of self-shielded flux-cored wire can be significantly higher than that of stick electrodes, offering better flexibility and wind resistance for outdoor welding compared to other working gas environment protective welds; typically, we can weld under level four wind conditions. Since they do not require protective gas, they are suitable for outdoor or high-altitude operations, hence commonly used in system installation engineering sites and construction sites.

Currently, self-shielded gas shielded welding wire is mainly used for low carbon steel welded structures. The metal plasticity and toughness of self-shielded wires are generally lower than those with auxiliary protective gas core wires. Additionally, self-shielded gas shielded welding wires produce more smoke during welding; therefore, ventilation should be enhanced in narrow spaces. The selection of gas shielded welding wire is very important; to achieve the desired welding effect, it is essential to choose suitable and high-quality brand gas shielded welding wires.