Tungsten Atomic Symbol : W Atomic Number : 74 Melting Point : 3410 DC Density : 19.30 g/cc Content Pure tungsten ( W 99.95% ); Process Sintering, Forging, Rolling and Machining. Usage High-temperature furnace industry, glass and crystal producing, illumination, electronics, electron-vacuum etc. Tungsten crucible/boat W content ≥ 99.95% O.D.≤450 mm Wall: 0.5 - 15 mm Tungsten boat According to the user's drawing.