O-30-H Beryllium Optical Grade

Alternative and trade names
O-30-H
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Description

Materion’s O-30-H beryllium was originally developed to make the mirrors for the James Webb Space Telescope (JWST).


The unique combination of property characteristics make this material critical for expanding optical space applications. O-30-H was featured in Astro2010: The Astronomy and Astrophysics Decadal Survey, Technology Development Papers, no. 23. In Enabling Future Space Telescopes: Mirror Technology Review and Development Roadmap, Dave Baiocchi of RAND Corporation and H. Philip Stahl of NASA Marshall discuss O-30-H beryllium metal and the ways it advances space optics.


In addition to the low scatter optics of O-30-H, this metal is well suited for a variety of other space applications. With the highest thermal isotropy of any grade of the beryllium metals that we offer, it is a cryogenically optimal substrate material.

This material data has been provided by Materion Brush GmbH.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

1.85 g/cm³

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Theoretical density for BeO: 0.5%

Grain size

15 μm

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max., ASTM E-112

Mechanical

PropertyTemperatureValueComment

Elongation

23.0 °C

2 %

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min.

Tensile strength

23.0 °C

345 MPa

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Yield strength Rp0.2

23.0 °C

207 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1.12E-5 1/K

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overall average for 5-65°C

Chemical properties

PropertyValueComment

Aluminium

0.07 %

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max.

Beryllium

99 %

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min., BeO: 0.5% max

Carbon

0.012 %

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max.

Magnesium

0.07 %

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max.

Other

0.04 %

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max., other metallic impurities each

Silicon

0.07 %

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max.

Technological properties

Property
Application areas

It is used in space optical applications due to the lower level scatter and ease to polish. This beryllium metal was used in the primary optics for the James Webb Space Telescope.