
Pure tungsten bar is made of 99.95% tungsten?power and its forging and annealing process?is shown by test. The bar?has physical properties e.g. density 19.3g/cm3, melting point (liquid) 3422℃,?electricity conductivity 30% IACS min and hardness 69hra min. It owns?special characters including low thermal expansion, good thermal conductivity, sufficient resistance and high elastic modulus. The bar?is widely applied in various fields, e.g. support line, lead-in line, printer needle, various electrodes, quartz furnace, filament, high-speed tools, automatic products, sputtering target and heating devices…