Products Description

Black tungsten wire is mainly used in the production of spiral incandescent lamp filaments, cathodes and support structures for vacuum cleaners, heating elements for high-temperature furnaces, and evaporation sources for gold plating processes. Manufacturing of electric light sources and vacuum components, used as high-temperature heating elements and high-temperature structural components, and used to make tungsten spirals for vacuum deposition. Coarse tungsten wire, after straightening, surface polishing, and cutting into rod shapes, is widely used as a glass metal lead seal in the lighting and electronics industry.

features and Application

Features

High Melting Point and Excellent Thermal Conductivity: Black tungsten wire has an extremely high melting point of 3410°C and good thermal conductivity, allowing it to maintain stable performance even in high-temperature environments.

High Tensile Strength: Black tungsten wire exhibits high tensile strength, enabling it to retain its shape under significant mechanical stress.

Corrosion and Oxidation Resistance: Its specialized surface coating provides excellent corrosion and oxidation resistance, ensuring reliable performance even at elevated temperatures.

Superior Electrical Conductivity: Black tungsten wire possesses good electrical conductivity, making it highly effective in electrical applications.

Low Thermal Expansion Coefficient: Due to its low thermal expansion coefficient, black tungsten wire experiences minimal dimensional changes under temperature fluctuations, ensuring high stability.

Excellent Creep Resistance: Under high-temperature conditions, black tungsten wire resists creep deformation, maintaining structural integrity.

Application

Lighting Applications: Black tungsten wire is commonly used to manufacture incandescent lamp filaments. When coiled and heated to high temperatures, it emits light through a process known as thermal radiation. It is also used in automotive lamp filaments.

High-Temperature Furnace Heating Elements: Due to its high melting point and excellent thermal conductivity, black tungsten wire is widely employed in heating elements for high-temperature furnaces.

Electronics: Black tungsten wire is utilized in critical components of electronic devices, such as vacuum tubes and electron beam emitters.

Medical Field: In medical equipment, black tungsten wire is used in the production of X-ray tubes, radiation shielding, and surgical instruments.

Aerospace & Military: Black tungsten wire finds applications in aerospace and military sectors, including missile guidance systems and aircraft components.

Other Applications: It is also used in high-temperature structural components, thermocouple wires, and cutting/welding filaments.

Specification

Black tungsten wire size	DIA.≥17µm;
Purity of black tungsten wire	99.95%;
Black tungsten wire brand	W-1, W-2, WAL-A, WAL-2;
Properties of black tungsten wire	non-sag; good wearing, high temperature resistance, formation under high temperature; good winding; excellent coiled ability;
Surface treament	alkali washing surface or black surface;

FAQ

Are you a factory or manufacturer?

A: Yes, we are a factory but generally, we use our trading company to handle the business abroad. It will be convenient to receive the remittance and arrange the shipment.

What is the delivery method?

A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.

Why is your product so cost-effective?

A: We cut out the middlemen in the end-to-end manufacturing process. Rather than obtaining semi-finished goods from other suppliers, we obtain our raw material of APT powder directly from its source.

Do you do spot quality inspection or full inspection?

A: 100% full inspection. Inspectors will check the finished product individually, to ensure they adhere to all parameters. All unqualified products are discarded.

How do you ensure your lead time?

A: We have an efficient Order Management System, from material preparation to machining, and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.

What is the MOQ of Black Tungsten Wire?

A: Depends on quantity, generally, no MOQ limit.

How to pay for it?

A: A bank transfer (T/T) will be acceptable.

What is the delivery time?

A: around 7-20 days which depends on the quantity and production.

What is kind of the package?

A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo

What is the lead time?

A: from order placed to cargo receiving will take around 10-25 days.

Why does Black Tungsten Wire have a black surface?

The black appearance comes from a protective coating of graphite and tungsten oxides formed during manufacturing. This layer enhances oxidation resistance and high-temperature stability.

How does Black Tungsten Wire compare to pure tungsten wire?

While both share high melting points and strength, the black variant has better oxidation resistance due to its coating, making it more durable in open-air high-heat conditions.