... certificate High purity and density Better quality and competitive price Wolfram Rod, Wo Rod on ASTMDensity: >=19.20 g/ ... heating elements of fumace, eletcrode fir fire nekting rare- earth. Mainly used to found ingredient of material, cutter and heads,tungsten wire for ... , artillery,rockets, satellite,airplanes and ships. High purity wolfram Rod Specification(%) Main Comp.W≥99.98Other Content≤Fe0 ...