Alloy 360 Nickel Beryllium


Mechanical and electronic components can be subjected to extremely high temperatures, so the materials used to make those components must be able to endure the heat—and perform reliably. Materion's Alloy 360 nickel-beryllium can withstand periodic rises in temperature up to 700°F (350°C), while maintaining good spring characteristics. This makes it ideal for applications such as high-temperature electrical connectors and Belville washers used in fire sprinkler systems.

Because of the pressure put on this single component, Belleville washers are required to be made of nickel-beryllium alloy which has been proven to withstand challenging conditions. Nickel beryllium strip Alloy 360 resists corrosion and meets the stress relaxation resistance requirements— retaining 95% of its initial stress after 1,000 hours at 600°F.

Alloy 360 also provides excellent formability and strength that can reach 300,000 psi after a simple one-step heat treatment.

To learn more about the physical and mechanical properties, sizes and tolerances of Alloy 360, download our Alloy 360 data sheet


  • Exceptional strength & hardness
  • High conductivity
  • Excellent formability with stress relaxation less than 5% at 400˚F
  • Resistant to wear, corrosion, thermal shock & oxidation


  • Belville washers for sprinkler heads
  • Burn-in & test sockets (BiTS)
  • Electric stovetop components
  • Thermostats
Contact our materials experts to learn more about Alloy 360 and its advantages.
Technical Details
Alloy 360 (after age hardening) Properties
Elastic modulus: 28 - 30x106 psi
195-210 GPa
Density: 0.299 lb./in3
8.27 g/cm3
Thermal conductivity: 28 BTU/hr ft °F
48 W/m K
Coefficient of Thermal Expansion: 8.0 x 10-6 in/in °F
14.5 x 10-6 mm/mm °C
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