Appearance: Silver gray metallic luster. The products are made of W-1. Properties, specification and applications Description Grade W content Density Specification Application Pure tungsten bars W-1 ≥99.95 ≥17.5 12?2?00 14?4?50 16?6?00 For making W-rods and contacts W bars for drawing wire W-1 ≥99.95 For drawing wire or poker in rare earth material smelting W bars for steel smelting W-1 W-4 ≥99.95 ≥99.90 Suitable for steel smelting or for alloy additive Tungsten slab W-1 ≥99.95 ≥18.0 (20-40)?90-20)?200-600) Suitable for rolling plate, sheet