Copper powder, specifically high-purity electrolytic copper powder (>99.7%), is widely used in welding electrodes to improve electrical conductivity, thermal performance, and to facilitate the brazing process. It acts as a key component in flux-coated welding rods, conductive pastes for brazing, and in sintered materials like resistance welding electrodes. Typically 99.7% or higher Often fine-mesh e.g., −325 mesh to ensure proper mixing in coatings or pastes.