Tungsten core wire (for semiconductor production diamond wire)

basic information

Properties of W: - Specific gravity (Sp): 19.3 g/cm³ (almost the same as gold) - Melting point: 3380°C (the highest among metals) - Mohs hardness: 7.5 - Boiling point: 5555°C - Thermal conductivity: 160 W/m·K (at 300 K) Strength: - Tensile breaking strength: - W25: 3N (approximately 300 gf) - W30: 4N (approximately 400 gf) - W35: 5N (approximately 500 gf) - W40: 7N (approximately 700 gf) Comparison of physical properties with high carbon steel core wire: - Electrical resistivity: about half that of carbon steel - Breaking strength: more than 1.2 times - Torsional rigidity: more than 10 times - Young's modulus: 1.7 times - Elongation ratio: about 60% Chemical properties of W: - Material: Tungsten W 99.4% + Rhenium Re 0.6% alloy - Symbol: WRe0.6 - Reaction with O2: Burns at 400-700°C to produce WO3 (oxidation prevention and cooling measures are necessary) - Hazardous material: No - Toxicity: None - Quality standard: ASTM B760 Production process of W wire: W powder → Re 0.6% doping → Powder metallurgy hot forging → Round bar → 0.39 mm original wire → Hot drawing through multi-stage die to form → 0.025 mm wire

Price information

(Price for one roll of 100 km length, including shipping and tax) - W25: 210,000 yen - W30: 250,000 yen - W35: 290,000 yen - W40: 360,000 yen

Price range

P3

Delivery Time

P4

Applications/Examples of results

Core wire of a diamond multi-wire saw.

Detailed information

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  Electron microscope photograph

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  Tungsten ultra-fine wire

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  (W line production process) W powder → Re 0.6% doping → powder metallurgy hot forging → round bar → 0.39 mm original wire → hot drawing forming through multi-stage die mouth → 0.025 mm wire

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  100 km roll of bobbin

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