3.2mm flux coated wearbronze (Nickel Bronze/Nickel Silver). For use with Oxy Acetylene Gas. For all steels and Cast irons. Free flowing, high strength build up and wear surfacing alloy. For shafts, gear teeth, valves, pistons, wear surfaces, sliders. Provides high friction resistance. Contains 10% Nickel. Tensile strength 100,000 psi (700Mpa). Flux coated, so no extra flux needed.