O-30-H

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O-30-H GRADE BERYLLIUM

O-30-H grade beryllium is hot isostatically pressed beryllium consisting of 99% beryllium with a maximum of 0.5% beryllium oxide.

Low oxide grades are preferred for bare beryllium mirrors because they yield a lower level scatter and polish easier than higher oxide grades.

O-30-H beryllium was chosen for the primary optics for the James Webb Space Telescope.

TENSILE PROPERTIES

Minimum tensile properties for the material at room temperature (testing compliant with ASTM E-8).

Ultimate Tensile Strength, psi, minimum  50.0 (345 Mpa)
Yield Strength (0.2% offset), psi, minimum  30.0  (207 Mpa)
Elongation (% in 4 diameters), minimum 2.0
Micro-yield Strength, ksi 3.0 (21 MPa)

AVAILABLE DESIGN CONFIGURATIONS

  • Available in rod or bar.
  • Special sizes and shapes can be made.