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Alumina Hexagonal Bolt

The Alumina Hexagonal Bolt is one of Goodfellow's range of bolts made from alumina (aluminium oxide) ceramic. With 118 variations available, these bolts can be customized for applications needing a fastening that is electrically insulating, thermally conductive and chemically inert. This bolt features a hexagonal head to provide a secure grip for assembly. Example applications include semiconductor processing equipment, vacuum systems and other applications requiring high temperature stability in corrosive environments.
Formula: Al?O?
Head Style: Hexagonal Head
Size: M2 x 5mm
Quantity: 5 Pcs
Pitch: 0.4mm
Standard: ANSI B18.6.7M-1985
CAS Number: 1344-28-1
UOM Code: 113-145-64
SKU: 1000022457
Product Code: AL60-BT-000120

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Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Good
Halogens Good
Metals Good
Electrical Properties
Element Value
Dielectric constant 9-10.1
Dielectric strength( kV mm⁻¹ ) Oct-35
Volume resistivity( Ohmcm ) >10¹⁴@25
Physical Properties
Element Value
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 3.9
Thermal Properties
Element Value
Melting point( C ) 2100
Upper continuous use temperature( C ) 1700
Specific heat( J K⁻¹ kg⁻¹ ) 850-900@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 26-35@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 8@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 300-400
Hardness - Knoop( kgf mm⁻² ) 2100
Hardness - Vickers( kgf mm⁻² ) 1500-1650
Shear strength( MPa ) 330
Tensile strength( MPa ) 260-300
Pultrusions
Element Value
Compressive strength( MPa ) 2200-2600
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