Tungsten Rod/Bar 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 Specification: GB4187-84; GB4186-84 Application: Used in the field of electronics, electric light source, electric vacuum, tungsten heater, etc Tungsten Rod/Bar alloy, condition, dimension(Table1) Alloy Processing Dimension,mm Diameter tolerance(mm) Type Sintering Forged Straightened GrindingMachining W1W2 Sintering Grinding Machining Forged 0.8≤d＜3.0 — — ±2% ±0.03 W Wire Rod 3.0≤d＜6.5 — ±2% ±0.05 6.5≤d＜11.0 — ±0.08 11≤d＜16 — ±1.0 ±1.0 ±0.2 W Rod 16≤d＜25 — ±1.0 ±1.0 ±0.2 25≤d＜45 ±5 ±1.5 ±1.5 ±0.3 45≤d＜55 ±5 ±2.0 ±2.0 ±0.5 55≤d＜60 ±5 ±2.5 ±2.5 ±0.8 60≤d＜70 ±5 ±3.0 ±3.0 ±0.8 70≤d＜75 ±8 ±3.5 ±3.5 ±1.0 75≤d＜85 ±8 ±4.0 ±4.0 ±1.5 85≤d＜90 ±8 ±4.5 ±4.5 ±1.5 90≤d＜100 ±8 ±4.5 ±4.5 ±1.5 Note: the diameter of the grinding or machining method of allowable deviation can be according to buyer’s requirement. Production Process Quality products are guaranteed by focusing on every detail in the production process; and leading process leads to leading-edge products.