... heating bodies Boxin companyhas in-depth technical know-how in the field of rare and refractory metal materials. The products are ... as well. Materials include Tungsten, Molybdenum, Tantalum, Niobium, Titanium, Nickel, Zirconium, Vanadium, Cobalt and their alloys etc. ... 1999 GB4186-84 GB4188-84 ASTM B387-90 3.Application: being widely used in spaceflight, aerospace electric vacuum, electron, metallurgy ...