S-200-F Beryllium: Premium Structural Grade for Advanced Optical and Aerospace Applications

Vacuum hot pressed 98.5% beryllium. S-200-F is used as an optical substrate and support bench in numerous astronomical telescopes, fire control and FLIR systems, and spacecraft and weather satellites.

Properties

General

Property	Temperature	Value	Comment
Bulk density	23.0 °C	1.84 g/cm³	for BeO amount of 1.5%
Grain size		20 μm	max.

Mechanical

Property	Temperature	Value
Elastic modulus	23.0 °C	290 GPa
Elongation	23.0 °C	2 %
Fatigue strength	23.0 °C	262 MPa
Tensile strength	23.0 °C	324 MPa
Yield strength Rp0.2	23.0 °C	241 MPa

Thermal

Property	Temperature	Value
Coefficient of thermal expansion	23.0 °C	1.13E-5 1/K
Specific heat capacity	23.0 °C	1950 J/(kg·K)
Thermal conductivity	23.0 °C	216 W/(m·K)

Electrical

Property	Value
Specific Electrical conductivity	45 % IACS

Chemical properties

Property	Value	Comment
Aluminium	0.1 %	max.
Beryllium	98.5 %	min., BeO: 1.5% max
Carbon	0.15 %	max.
Iron	0.13 %	max.
Magnesium	0.08 %	max.
Other	0.04 %	max., other metallic impurities each
Silicon	0.06 %	max.

Technological properties

Property
Application areas	Intelligence, surveillance and reconnaissance (ISR) systems, Electro-optical infrared (EO/IR) & targeting systems, Airborne early warning & control systems (AEW&C), Surveillance, reconnaissance and targeting (SRT), Size, weight and power (SWaP) replacement systems, Semiconductor capital equipment, Space-based systems and components, James Webb Space Telescope support structure
Processing history	This standard grade is to be produced through the consolidation of beryllium powder by vacuum hot pressing. Parts and shapes are machined from the vacuum hot pressed material.

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Metal