... .Competitive price 3.High quality 4.Best Service Lead powderGrey powder with drop form, easy to be oxidized in the moist ... air.SPECIFICATIONCHEMICAL COMPONENT % Pb ≥ 99.9 Fe ≤ 0.005 Cu ≤ 0.01 As ≤ 0 ... in manufacturing porous bronze bearings self-lubricated, structural parts of powder metallurgy, friction discs, sheathing boards of brakes, clutches, metal-graphite ...