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% min O.D. 450 mm max Wall: 0.5 - 15 mm Tungsten boat According to the user's drawing