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Tungsten Powder High Purity Tungsten Powder Wolfram in Alloy Product and Metallurgy. High Purity Options: Available in 95%, 99%, and 99.95% purity levels. Customizable Sizes: Particle sizes range from 2-3um to -80mesh. Extreme Hardness: Hardest metal; sintered rod hardness 200-250. Corrosion Resistance: Strong resistance to acids, alkalis, and water. Uniform Dispersion: Features uniform particle size and good dispersion.