Short Description:

Product Description

4J32 alloy rod is a Fe-Ni controlled expansion alloy, specially designed for glass-to-metal and ceramic-to-metal sealing applications. Its thermal expansion coefficient closely matches that of certain hard glasses and ceramics, ensuring excellent hermeticity and reliability.

This alloy offers good machinability, stable thermal expansion performance, and reliable mechanical properties, making it widely used in semiconductor packaging, vacuum devices, relays, sensors, aerospace instruments, and electronic components.

Density: 8.1 g/cm³

Thermal Expansion (20–400°C): 4.5 ×10⁻⁶/°C

Tensile Strength: 450 MPa

Hardness: Hardness

Working Temp: 196°C to 450°C

Standard: GB/T, ASTM, IEC