Product Overview
Tungsten wire is manufactured from high-purity tungsten (≥99.95%) through hot isostatic pressing, wire drawing, and straightening processes, producing fine metal filaments with diameters ranging from micrometers to several millimeters.
Chemical Properties
Element Symbol/Atomic Number: W, Atomic Number 74
Chemical Stability: Inert to most acids and alkalis at room temperature and pressure; slowly dissolves in concentrated nitric acid, hydrofluoric acid, or aqua regia
Oxidation Behavior: Forms dense WO₃ surface oxide layer above 400°C, providing oxidation protection
Alloying/Doping: Common doping elements include potassium, aluminum, and rhenium to enhance high-temperature strength and fatigue resistance
Low Vapor Pressure: Maintains extremely low vapor pressure at 2000°C, suitable for high-vacuum environments
Mechanical Properties
|
Parameter |
Typical Values |
|
Tensile Strength |
3000-4000 MPa (fine wire) |
|
Yield Strength |
~1500-2500 MPa (diameter dependent) |
|
Hardness |
350-450 HV (Vickers) |
|
Elongation |
<5% (brittle nature) |
|
High-Temperature Strength |
Decreases above 1000°C, but W-Re alloys maintain higher strength |
|
Creep Resistance |
Maintains structural integrity at 1200-1500°C for extended periods |
Technical Specifications (Typical Values)
|
Parameter |
Value Range |
Notes |
|
Melting Point |
3410-3422°C |
Highest among all metals |
|
Density |
19.25-19.28 g·cm⁻³ |
High specific gravity material |
|
Tensile Strength |
1900-2300 MPa (standard) |
|
|
Hardness |
350-450 HV (Vickers) |
|
|
Thermal Expansion Coefficient |
4.30 × 10⁻⁶ K⁻¹ (20-200°C) |
|
|
Electrical Conductivity |
0.05-0.93 Ω·mm²/m (temperature dependent) |
|
|
Thermal Conductivity |
177 W·m⁻¹·K⁻¹ |
|
|
Vapor Pressure |
Extremely low, suitable for high-vacuum environments |
|
|
Corrosion Resistance |
Resistant to most acids/alkalis; slowly attacked by nitric acid, hydrofluoric acid, aqua regia |
Applications
|
Industry |
Typical Applications |
|
Lighting |
Incandescent lamps, halogen lamps, xenon lamp filaments, LED preheat filaments |
|
Electronics |
Vacuum tube cathodes, power tube cathodes, heating elements, thermocouple protection tubes |
|
Aerospace |
Aircraft engine high-temperature components, satellite orbiter support rods, flight instrument sensors |
|
Medical |
X-ray tube cathodes, surgical instruments (electrosurgical devices, surgical robots) |
|
Photovoltaics/Semiconductors |
Monocrystalline silicon wafer cutting wires, photovoltaic inverter heat dissipation, microwave oven heating elements |
|
Protection/Special Applications |
Cut-resistant textiles, high mechanical stress or extreme environment applications |
|
Defense |
High-voltage electronic devices, electrodes, penetrator materials (due to high density) |
|
Chemical/High-Temperature Furnaces |
High-temperature resistance furnace heating elements, vacuum coating, ion implantation system chambers |
Key Advantages
Extremely High Melting Point: Continuous operation above 3400°C, ideal for high-temperature filaments and furnace heating elements
High Density & Strength: Excellent mechanical support and radiation shielding capability
Low Thermal Expansion Coefficient: Minimal dimensional changes during thermal cycling ensures equipment stability
Good Electrical/Thermal Conductivity: Maintains low resistance and high thermal conduction at elevated temperatures
Corrosion Resistance & Low Vapor Pressure: Long service life in vacuum and acid/alkaline environments
Processability: Drawable to ultra-fine diameters (<30 µm) with secondary processing including gold plating and cleaning/polishing
Creep & Fatigue Resistance: Maintains strength during long-term high-temperature operation, particularly with doped or W-Re alloys
Selection Guidelines
Operating Temperature:
≤1500°C: Standard high-purity tungsten wire
1500°C: Doped (e.g., W-Re) or surface-treated tungsten wire for enhanced high-temperature strength and oxidation resistance
Mechanical Load Requirements:
High tensile or impact environments: Select larger diameter, drawn tungsten wire with tensile strength ≥3000 MPa
Ultra-fine wire (<30 µm) for photovoltaic cutting or microelectronics: Strict tolerance control (±1.5%) with surface cleaning and polishing
Electrical Requirements:
Low resistance heating elements: Medium diameter tungsten wire with purity ≥99.95% for stable resistivity
High-frequency electronic devices: Gold-plated tungsten wire to reduce contact resistance and enhance corrosion resistance
Surface Treatment:
Cleaning and polishing: Improves optical transmittance and electrode contact performance
Gold plating: For high-reliability electrical contacts
FAQ:
Do you provide samples?
A: Yes, we offer complimentary samples with shipping arranged by the customer. We recommend testing samples or placing trial orders before larger purchases.
Q: How competitive are your prices?
A: Our pricing reflects exceptional value when considering the premium quality and comprehensive service we provide.
Q: What is your quotation turnaround time?
A: Typically 24 hours after inquiry receipt. Urgent requests receive priority handling upon notification.
Q: How do I request custom products?
A: Please share your drawings, images, or samples. We will confirm specifications and promptly initiate production.
Contact:
About STRX Titanium – Why Choose Us?
Premium Materials：We select premium raw materials to ensure quality control from the source.
Rigorous Quality Inspection：Strict quality inspection standards are implemented to ensure 100% compliance with customer requirements.
Customized Solutions：We understand that each industry has unique needs. Our team works closely with clients to tailor products based on specific requirements. We customize all titanium products (color/size, etc.) according to customer drawings or ideas.
Fast Delivery：Advanced production management ensures efficient and prompt delivery from production to shipment.
Expert Support：Gain insights from our dedicated expert team, who provide professional advice and practical assistance. STRX Titanium helps you identify and select the best solutions tailored to your business needs, ensuring optimal results and satisfaction.
STRX Titanium has earned consistent praise from clients for high-quality products and competitive pricing. With strict quality control and professional technical support, we look forward to cooperating with you!
In Summary,STRX Titanium is a leading manufacturer and supplier of titanium products in China. We maintain strong technical partnerships with major domestic and international equipment manufacturers and uphold rigorous quality standards to meet client demands.
If you are looking for a reliable titanium product supplier, please contact us immediately to learn more about our products and services.
Email: info@strx-titanium.com
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