Expansion Alloy 4J32
4J32, as a super Invar alloy, boasts core advantages in ultra-low expansion and stable mechanical properties, making it ideal for high-end precision manufacturing applications, specifically:
1. Ultra-low expansion and excellent dimensional stability: The thermal expansion coefficient is ≤1.0×10⁻⁶/°C in the 20-100°C range, and as low as 0.3×10⁻⁶/K at 25-500°C. Dimensional change is less than 0.01% after 300 thermal cycles from -50°C to +500°C, making it virtually unaffected by temperature fluctuations.
2. Excellent high-temperature and mechanical properties: It exhibits outstanding high-temperature creep strength, reaching 950 MPa after 100 hours of sustained loading at 800°C, far exceeding X-750 nickel-based alloy; the shear modulus is approximately 110 GPa, with a fluctuation range of only ±2%, meeting the stringent requirements for material strength and rigidity in high-precision applications.
3. Good compatibility and processability: It can achieve airtight sealing with materials such as ceramics and glass, suitable for electronic device packaging; it supports various processing techniques such as precision rolling and hot isostatic pressing, with stable cutting forces, making it suitable for extremely high-precision machining. It can also be supplied in various forms such as rods and plates.
4. Balanced overall performance: It not only has excellent magnetic permeability, but also stable electromagnetic properties at low temperatures, making it suitable for the electronics and communications fields; it also meets the corrosion resistance standards of AMS 5654, enabling it to withstand complex corrosive environments in the chemical industry and marine applications.
