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Beryllium S-200F, Vacuum Hot Pressed
Categories: Metal; Nonferrous Metal; Beryllium Alloy; Pure Element

Material Notes: The standard structural beryllium grade, generally processed by HIP'ing. Applications include inertial guidance systems, missile interstages, optical substrates, spacecraft structures, and small rocket nozzles.

Property data below for S-200F has been supplemented with other property data generally applicable to pure beryllium.

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: Brush Wellman; S200F Alloys
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Physical PropertiesOriginal ValueComments
Density 1.85 g/cc
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate >= 324 MPa
Tensile Strength, Yield >= 241 MPa
@Strain 0.2 %
Elongation at Break >= 2.0 %
Tensile Modulus 303.4 GPa
Compressive Yield Strength 207 MPa
Notched Tensile Strength 345 MPaTypical for Kt = 1.9. Notched strength ratio =1.0.
Poissons Ratio 0.18
Fatigue Strength 261 MPa
@# of Cycles 1.00e+7
Krause rotating beam
 290 MPa
@# of Cycles 100000
Krause rotating beam
Fracture Toughness 10.6 - 12.3 MPa-m½KIC for hot-pressed structural grades
Shear Modulus 135 GPatypical Be
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00000420 ohm-cmtypical Be
Magnetic Susceptibility -1.00e-6cgs/g (typical Be)
Critical Superconducting Temperature 0.0260 Ktypical Be
 
Thermal PropertiesOriginal ValueComments
Heat of Fusion 1133 J/gtypical Be
CTE, linear 11.4 µm/m-°C
@Temperature 25.0 °C
 14.5 µm/m-°C
@Temperature 25.0 - 300 °C
typical Be value
 16.5 µm/m-°C
@Temperature 25.0 - 600 °C
typical Be value
 18.4 µm/m-°C
@Temperature 25.0 - 1000 °C
typical Be value
Specific Heat Capacity 1.925 J/g-°C
Thermal Conductivity 216.3 W/m-K
Melting Point <= 1185 °C
Liquidus 1185 °C
Boiling Point 2471 °C
 
Optical PropertiesOriginal ValueComments
Emissivity (0-1) 0.61typical Be; 650 nm
Reflection Coefficient, Visible (0-1) 0.50typical Be: 50% visible; 55% UV; 98% IR (10.6 µm)
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al <= 0.10 %
BeO <= 1.5 %
Beryllium, Be >= 98.5 %
Carbon, C <= 0.15 %
Iron, Fe <= 0.13 %
Magnesium, Mg <= 0.080 %
Other, each <= 0.040 %
Silicon, Si <= 0.060 %

References for this datasheet.

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MBES20 / 10292

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