• 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.

Chemical Composition:

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.

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 － － － 12<d≤18 >0.44~0.98 － ±3 ±4 － － － 18<d≤40 >0.98~4.85 ±2 ±2.5 ±3 － － － 40<d≤80 >4.85~19.39 ±1.5 ±2.0 ±2.5 － － － 80<d≤300 >19.39~272.71 ±1.0 ±1.5 ±2.0 － － － 300<d≤350 >272.71~371.79 － ±1.0 ±1.5 － － － 350<d≤500 － － ±1.5 ±2.0 ±2.5 500<d≤1800 － － ±1.0 ±1.5 ±2.0