Tungsten Rhenium Wire

Tungsten rhenium wire, also known as tungsten rhenium alloy wire, is an alloy wire composed of tungsten (W)as the matrix and rhenium (Re) elements of different contents. Tungsten Rhenium Alloy is a high-density tungsten-based alloy with rhenium added in varying proportions. The rhenium content in the alloy is generally between 1% and 5%.

Generally speaking, once tungsten wire is used at high temperature and recrystallized, it becomes very brittle and is very easy to break under impact or vibration. In some electric light source products that require high reliability, in order to prevent the filament from breaking, rhenium is often added to the doped tungsten wire, which can reduce the ductile-brittle transition temperature of tungsten to room temperature or below.

Tungsten rhenium alloy combines the high melting point and high strength of tungsten with the excellent ductility and high-temperature creep resistance of rhenium, thus demonstrating outstanding stability and durability in high-temperature and high-stress environments.

According to the different rhenium content, tungsten rhenium alloys are divided into two categories, one is low rhenium alloy, which contains less than 5% rhenium; the other is high rhenium alloy, which contains 20% to 30% rhenium.

The common rhenium contents are 3%, 5%, 25% and 26%. Our regular models are:
W-3Re (Rhenium content: 3%)
W-5Re (Rhenium content: 5%)
W-20Re (Rhenium content: 20%)
W-25Re (Rhenium content: 25%)
W-26Re (Rhenium content: 26%)

Tungsten Rhenium Alloy Wire has good ductility and strength. Luoyang Rare Metal Research Material Co.,Ltd is experienced in providing the highest quality Tungsten Rhenium Alloy products. We offer various shapes according to your requirements.

Dimensions and Tolerance

- High melting point:

The melting points of tungsten (about 3422°C) and rhenium (about 3186°C) are both extremely high. The melting point of the alloy is close to that of pure tungsten, which is suitable for extremely high temperature environments.

-Good creep resistance:

The addition of rhenium significantly improves the high-temperature creep resistance of tungsten, preventing the material from deforming or breaking under long-term high temperatures.

- Enhanced ductility:

Pure tungsten is brittle and difficult to process, while the addition of rhenium improves the ductility of the alloy, making it easier to draw and form.

- Good oxidation resistance:

The surface is easily oxidized at high temperatures, but rhenium can slow down the oxidation rate and extend the service life.

-Low vapor pressure:

The evaporation rate is low in a vacuum environment, which is suitable for electric vacuum devices.

By alloying tungsten with rhenium, the wire gains properties that make it far more suitable for advanced applications than pure tungsten alone. This combination is why leading industries choose W-Re when reliability is mission-critical.

• Superior tensile strength – higher breaking point enables ultra-fine diameters without loss of performance.
• Greater ductility – reduces brittleness, making the wire easier to work with in demanding applications.
• Higher electrical resistance – ideal for detector technology, electronics, and high-voltage environments.
• Improved electron work function – enhances performance in scientific and semiconductor applications.
• Better stability under stress – long-term creep resistance ensures durability in extreme conditions.

Tungsten-rhenium wire can be used many industries: 

1) Low-rhenium alloy wire and high-rhenium alloy wire are matched into thermocouples, which have a wide temperature measurement range (0-2300C), high thermoelectric potential value, fast response speed, and good corrosion resistance. They can be used for high-temperature thermocouples and cathode wires. Therefore, tungsten-rhenium thermocouple wires are widely used in temperature measuring instruments.

2) High-temperature equipment used to produce high-temperature single-crystal sapphire for bundling purposes. Commonly used model is : W-25Re, diameter 0.5mm.

3) Various cathode ray tube filaments, electronic tube filaments and grids, light bulb filaments

4) Produce tungsten filament lamps with special requirements, chromatographic thermal sensitive components;
It has good low-temperature and high-temperature ductility, and good high-temperature anti-sagging performance. So it is very suitable for producing high-end filaments.
WRe wire has better plasticity and lower plastic-brittle transition temperature, so it is more suitable as a filament, which can effectively extend the service life of the light bulb.

5) Used as electrical contact material.

6) For military electronic equipment.

The production process of tungsten rhenium wire includes steps:

Raw material preparation → Raw material separation → Mixing → Reduction treatment → Secondary mixing → Press sintering →Rotary forging and drawing →Finished product.

The raw materials are tungsten powder and ammonium rhenate powder. which are processed through a series of physical and chemical treatment processes to ultimately produce tungsten rhenium alloy wire with specific properties.

• Mixing: The tungsten powder is mixed with rhenium in the desired proportions.
• Pressing: The mixed powder is pressed into the desired preliminary shape, such as cylinders, blocks, etc.
• Sintering: The pressed parts are sintered at high temperatures, forming a dense solid material.
• Annealing: The sintered products undergo an annealing process to remove internal stresses and improve toughness and ductility.
• Machining: Precision machining processes, such as turning, milling, and grinding, are applied to the sintered parts to achieve final dimensions and shapes.
• Heat Treatment: The alloy undergoes additional heat treatment to optimize properties such as hardness, strength, or other physical characteristics.
• Surface Treatment: If required, surface treatments (such as coating, passivation, etc.) are applied to enhance corrosion resistance, hardness, or other properties.

Luoyang Rare Metal Research Material Co., has advanced machining centers equipped with various high-precision processing equipment, enabling us to offer multiple machining services such as turning, milling, grinding, and drilling. Whether for large-scale production or customized small-batch orders, we guarantee high precision and performance to meet customer's specific requirements. The following are methods we will use during processing:

• Isostatic Pressing
• Forging
• Extrusion
• Molding
• Injection Molding
• Rolling
• Electrical Discharge Machining (EDM)
• Milling
• Turning

- Vacuum packing
- 400-600g per roll, 250m-260m per kg.
- Packed in carton or wooden case

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