High temperature resistant tungsten rod, also known as high temperature resistant tungsten alloy rod, is widely used in various fields due to its high melting point, low thermal expansion coefficient, good thermal conductivity and high resistance coefficient. For example: making support wires, lead-in wires, printer needles, various electrodes and quartz furnaces, filaments, high-speed tools, automotive automatic products, sputtering targets, etc. In addition, it is also used in the military field, and the tungsten wire straightened from the tungsten rod is widely used in the lighting industry.
The implementation standard of tungsten rod products is: GB/T 4187-2017, and the material and batch number are W1, WAl1, and WAl2. The diameter standards of black tungsten rod and polished tungsten rod are: W1 less than 3.0 and greater than or equal to 0.5; WAl1 less than 6.5 and greater than or equal to 3.0; WAl2 less than 20 and greater than or equal to 6.5. The difference is that the diameter tolerance of black tungsten rod is ±1.5%, and the diameter tolerance of polished tungsten rod is ±1.0%.
Tungsten rod optional specifications and sizes:
| Diameter (φ mm) | Max Length (mm) | Diameter Tolerance (mm) | Surface Finish |
|---|
| 0.5 – 1.5 | ≤80 | ≤0.03 | Polished Surface |
| 1.5 – 10 | ≤1000 | ≤0.05 | Polished / Forged |
| 10 – 30 | ≤1500 | ≤0.1 | Polished / Forged |
| ≥30 | ≤1500 | ≤0.1 | Polished / Forged |
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