... W1,W22. Purity :>=99.95%3. Characteristic:Melting Point: 3410 Degrees CelsiusBoiling Point: 5927°CDensity: 19.3g/m3High quality, workability4. Quality ... certification: ISO90025. Product Feature: High melting point, High-density, high temperature oxidation resistance, long service life, ... , artillery, rockets, satellite, airplane and ship. 99.95% Round Tungsten Bar