As one of the professional China tungsten wire manufacturers and suppliers, Hanz Material Technology is able to supply you with high quality tungsten filament, tungsten heater, tungsten wire price, tungsten wire heater, w1 tungsten wire. Welcome to make contact with us. Applications: For producing electric light source parts and electric vaccum components For producing heating elements and refractory parts in high temperature furnaces For producing heating elements used in vaccum metalizing or plating Appearance:  W-wire is regular black covered with graphite. After graphite is removed it is metallic luster. Designation Tungsten Content Impurity Elements Content Total Each WAL1, WAL2 ≥99.95% ≤0.05% ≤0.01% W1 ≥99.95% ≤0.05% ≤0.01% W2 ≥99.92% ≤0.08% ≤0.01% Note: Potassium is not counted in impurities content.   Chemical Composition:   Diameter tolerance(%): Diameter (μm) Weight (mg/200mm) Weight(mg/200mm) Tolerance(%) Diameter Tolerance(%) Grade 0 Grade 1 Grade 2 Grade 0 Grade 1 Grade 2 5≤d≤12 0.075~0.44 － ±4 ±5 － － － 120.44~0.98 － ±3 ±4 － － － 180.98~4.85 ±2 ±2.5 ±3 － － － 404.85~19.39 ±1.5 ±2.0 ±2.5 － － － 8019.39~272.71 ±1.0 ±1.5 ±2.0 － － － 300272.71~371.79 － ±1.0 ±1.5 － － － 350