High-Quality 4J29 Kovar Precision Alloy Tube from Chinese Manufacturer

Product Description

Our Kovar 4J29 precision alloy tube is a nickel-iron-cobalt material designed for applications needing strong thermal stability and hermetic sealing. It has a low coefficient of thermal expansion (CTE) that matches borosilicate glass and alumina ceramics, avoiding cracks or leaks from thermal stress. With tight dimensional tolerance (±0.01mm for OD/ID), smooth surface (Ra ≤ 0.8μm), and good weldability, it works well in aerospace, electronics, medical devices, and optical instruments—even in extreme temps (-270°C to 450°C).

DLX Alloy, a leading Chinese manufacturer of precision alloys, proudly offers high-quality 4J29 Kovar precision alloy tube. Engineered for exceptional performance in demanding applications, our 4J29 Kovar alloy tube is the go-to solution for industries requiring reliable hermetic seals and precise thermal management. As a versatile precision alloy tube, it combines nickel, iron, and cobalt to deliver unmatched compatibility with glass and ceramics, ensuring long-lasting integrity in high-vacuum environments.

With a commitment to excellence, we produce every 4J29 Kovar precision alloy tube using state-of-the-art manufacturing processes, including vacuum induction melting and precision drawing. This results in a product that exceeds industry standards for purity and consistency. Whether you're developing aerospace components or semiconductor housings, our Kovar precision alloy tube provides the durability and reliability you need. As a premier Chinese manufacturer, DLX Alloy ensures competitive pricing without compromising on quality, making our high-quality 4J29 Kovar tube an ideal choice for global partners.

chemical composition

Key Features

Our 4J29 Kovar alloy tube stands out with features designed for superior functionality:

• Controlled Thermal Expansion

  Matches the coefficient of expansion of borosilicate glasses and alumina ceramics, preventing stress cracks in sealed assemblies.

• High Purity Composition

  Consists of approximately 29% nickel, 17% cobalt, and balance iron, ensuring minimal impurities for optimal performance.

• Excellent Corrosion Resistance

  Withstands harsh environments, including oxidizing atmospheres up to 500°C, ideal for long-term reliability.

• Magnetic Properties

  Maintains low magnetic permeability, suitable for sensitive electronic applications.

• Customizable Fabrication

  Tailored to your exact specifications, with options for surface finishing and annealing to enhance machinability.

Packaging and shipping

About DLX

FAQ

What are your working hours and contact information? 

Monday to Saturday: 7:30 a.m. to 5:00 p.m. (Beijing Time, GMT+08:00). May 1st to 3rd are public holidays, as well as October 1st to 7th and the Lunar New Year holiday. If you have any questions, please email us during the holiday period. 

Do you offer free samples?

Yes, we can provide free samples for testing. The buyer is responsible for all the shipping costs. 

What are your payment terms?

Wire transfer, letter of credit, deposit, deposit, deposit, Western Union, Speedy Money, PayPal 

What is the delivery time?

Usually, the delivery time for samples is 7 days after the payment is confirmed.