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Graphite vs. Beryllia

Graphite belongs to the non-oxide engineering ceramics classification, while beryllia belongs to the oxide-based engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is graphite and the bottom bar is beryllia.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 90
1650
Elastic (Young's, Tensile) Modulus, GPa 21
350
Flexural Strength, MPa 80
240
Tensile Strength: Ultimate (UTS), MPa 18
140

Thermal Properties

Maximum Temperature: Mechanical, °C 220
1750
Thermal Conductivity, W/m-K 6.0
270
Thermal Expansion, µm/m-K 4.9
8.0

Otherwise Unclassified Properties

Density, g/cm3 1.8
2.9

Common Calculations

Stiffness to Weight: Axial, points 6.7
67
Stiffness to Weight: Bending, points 53
82
Strength to Weight: Axial, points 2.9
14
Strength to Weight: Bending, points 8.7
21
Thermal Shock Resistance, points 12
3.6