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Beryllium S-65C, Vacuum Hot Pressed
Categories: Metal; Nonferrous Metal; Beryllium Alloy; Pure Element

Material Notes: Composition listed is reported for product available from Materion Corporation (formerly Brush Wellman). Tensile data specific to S-65C has been supplemented with other property data generally applicable to pure beryllium.

S-65C is a premium material that exhibits at least 3% elongation in any direction at room temperature through controlled impurity ratios. It is used in the window frames, umbilical doors, and navigational base of the Space Shuttle. It has a lower oxide content but lower in strength than the standard grade, S-200F. It is the reference grade of beryllium for the International Thermonuclear Experimental Reactor (ITER) fusion energy program.

Please note that there are health hazards associated with beryllium, especially when present as airborne particles generated during processing. As with any material, be aware of hazards and take steps to reduce exposure to a safe level.

General beryllium information: Beryllium is one of the lightest metals and has a high strength-to-weight ratio, stiffness-to-weight ratio, and very high specific heat, thermal conductivity, and heat of fusion. It has significant ductility, is readily machined and can be rolled, drawn, or extruded. It finds applications in nuclear reactors (neutron moderator and reflector), X-ray sources/detectors (X-ray transparency), IR target acquisition systems, inertial guidance instruments, computer parts, other aircraft and satellite structures, and heat sink constraining cores. Beryllium is usually produced via a powder metallurgy process to improve machinability and mechanical properties.

Information provided by Materion Corporation (formerly Brush Wellman) and the references.

Key Words: S65C Alloys
Available Properties
  • Density
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield, 207 MPa min. Typical value is 338 MPa.
  • Elongation at Break
  • Modulus of Elasticity
  • Poissons Ratio, values between 0.07 and 0.18 have been reported for beryllium
  • Shear Modulus
  • Electrical Resistivity
  • Magnetic Susceptibility, cgs/g
  • Critical Superconducting Temperature
  • Heat of Fusion, Be has an unusually high heat of fusion.
  • CTE, linear, increases rapidly until 100°C
  • CTE, linear
  • CTE, linear
  • CTE, linear
  • Specific Heat Capacity
  • Thermal Conductivity
  • Melting Point
  • Boiling Point
  • Emissivity (0-1), 650 nm
  • Reflection Coefficient, Visible (0-1), 50% visible; 55% UV; 98% IR (10.6 µm)
  • Aluminum, Al
  • BeO
  • Beryllium, Be
  • Carbon, C
  • Iron, Fe
  • Magnesium, Mg
  • Other, each
  • Silicon, Si
Property Data

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