Tungsten tube Grade :W1 ,W2 W1,> 99.95%, W2 >99.92% OD.: ... -60 mm minimal thickness 0.3mm , length 200-1500mm Tugnsten tube Tungsten pipeGrade :W1 ,W2W1,> 99.95%, W2 >99.92%OD ... .3mm , length 200-1500mmHardness Hv>450Density >19.1g/cm3Microstruture (virtical section) , The fibred structure , the initial recrystallization temperature 1200-1250 CIt ...