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Low Expansion Alloy

At Beiye, a national high-tech enterprise with over 65 years of expertise, we specialize in the research, development, and production of low expansion alloys, also known as low thermal expansion alloys. Our advanced alloys, including BYP16 (4J32), BYP19 (4J36), BYP21 (4J38), and 4J40, are designed to maintain dimensional stability across a wide temperature range (20℃–100℃), making them ideal for high-precision instruments and devices. Serving over 1,000 customers in 40+ countries, Beiye delivers tailored precision alloy and supply with multiple varieties, specifications, and small-batch production to meet diverse industry needs.

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Thank You for Your Attention on Beiye!

Why Choose Beiye's Low Expansion Alloys?

Beiye is a specialized precision alloy manufacturing company. With our deep historical heritage and continuous spirit of innovation, we have become a leader in the global expansion alloys field. By choosing us, you will benefit from:


  • 65 Years of Industry Experience and Technical Accumulation:

    Since 1960, we have consistently focused on the R&D and production of high-performance alloys, accumulating rich professional knowledge and practical experience.

  • National High-Tech Enterprise Certification:

    Our R&D capabilities and production processes meet national standards, ensuring excellent product quality.

  • Global Customer Trust:

    We have provided high-quality products and services to over 1000 clients in more than 40 countries worldwide, earning an excellent reputation.

  • Diversified Products and Customization Capabilities:

    We offer various grades and specifications of low expansion alloys and support small-batch, multi-variety customized demands to meet your specific applications.

  • Integration of Research, Production, and Academia:

    Combining scientific research, pilot production, and manufacturing ensures that our products remain at the forefront of technology.

Applications of Low Expansion Alloys

Beiye’s low expansion alloys are critical in industries where precision and stability are paramount. Common applications include:

  • Aerospace: Components for navigation and control systems.

  • Electronics: Stable substrates for circuit boards and sensors.

  • Scientific Instruments: Precision measurement devices and optical systems.

  • Medical Equipment: Temperature-stable components for diagnostic tools.

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No.1, Qinghe Xiaoying East Road, Haidian District, Beijing City, P.R. China
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No.1, Qinghe Xiaoying East Road, Haidian District, Beijing City, P.R. China