Tungsten Wire Alloy: W1, W2 Chemical comopsition.% Alloy W Others, Less than Al Ca Fe Mg Mo Ni Si C N O W1 Rest 0.002 0.005 0.005 0.003 0.010 0.003 0.005 0.008 0.003 0.005 PS: W≥99.95% Density: 19.1g/cm3 Application: Tungsten wire is mainly used in the manufacture of all kinds of incandescent lamp, fluorescent lamp, halogen lamp filament and HID lamp with electrodes, and a variety of heating components, vacuum coating, heating, TIG electrodes, etc Feature: High temperature: Acc. To buyer’s usage, classify different requirements of temp. Diameter of consistency: Tungsten wire each 200mm distance diameter not exceed 0.5% of diameter. Linearity: Normal Tungsten wire: GB/T 232772-2009 Straightened Tungsten wire: Diameter <100μm, each 500mm prolapse height ≥450mm; Diameter ≥100μm, each 100mm Chord length of arc height ≤10mm. Surface condition: smooth surface, no crack, burr, scratches, pits, uneven, oil and other defects. Winding ability: on the process of winding, Tungsten wire won’t crack. Weight of each wire: Small diameter of Tungsten wire weight over 5kg, Big diameter of Tungsten wire over 10kg. Tungsten wire diameter(Table1)： Diameter（μm） Weight（mg/200mm） 200mm Weight tolerance (%) Diameter tolerance (%) Grade 0 Grade Ⅰ Grade Ⅱ Grade Ⅰ Grade Ⅱ 8＜d≤14 0.19＜p≤0.59 ±3.0 ±4.0 ±5.0 — 14＜d≤18 0.59＜p≤0.98 ±2.5 ±3.0 ±4.0 — 18＜d≤40 0.98＜p≤4.85 ±2.0 ±2.5 ±3.0 — 40＜d≤80 4.85＜p≤19.39 ±1.5 ±2.0 ±2.5 — 80＜d≤300 19.39＜p≤272.71 ±1.0 ±1.5 ±2.0 — 300＜d≤350 272.71＜p≤371.18 — ±1.0 ±1.5 — 350＜d≤500 — — ±1.5 ±2.0 d＞500 — — ±1.0 ±1.5 Note: the specification tolerance can customize according to customer’s requirements. Prduction Process Quality products are guaranteed by focusing on every detail in the production process; and leading process leads to leading-edge products.