... and mid-F fused flux.2.Current:direct current(DC).usage:1.for welding steam turbine rotor, synthetic chemical containers, nuclear power ... °C Result ≥510 ≥600 ≥35 120Cautions:1.Impurities on the welding surface must be removed, such as oil stain, moisture, iron ... 2 hours under the temperature of 250~300°c before welding. SAW Flux HJ251