copper coated steel wire 1 copper layer average thickness than 0.25mm; 2,tensile strength less ... , exothermic welding powder, grounding electrode, GEM and so on. copper clad steel round wire1, copper layer average thickness (conventional) ≥ 0.25mm; 2, tensile ... strength ≥ 600N/mm 2 3, flatness error ≤ 1mm 4, copper ...