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Steatite vs. Grade A Lava

Both steatite and grade A lava are oxide-based engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is steatite and the bottom bar is grade A lava.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 540 to 620
76 to 170
Flexural Strength, MPa 32 to 150
28 to 69
Tensile Strength: Ultimate (UTS), MPa 60 to 220
6.9 to 21

Thermal Properties

Maximum Temperature: Mechanical, °C 750 to 1230
650 to 1130
Specific Heat Capacity, J/kg-K 850 to 860
840
Thermal Conductivity, W/m-K 1.8 to 2.5
2.0
Thermal Expansion, µm/m-K 7.0 to 9.0
2.5 to 3.3

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.7 to 6.5
5.3 to 5.8
Dielectric Strength (Breakdown Potential), kV/mm 7.9 to 16
3.2 to 3.9

Otherwise Unclassified Properties

Density, g/cm3 1.9 to 2.8
2.3 to 2.5

Common Calculations

Strength to Weight: Axial, points 6.4 to 32
0.77 to 2.5
Strength to Weight: Bending, points 13 to 42
3.2 to 7.3
Thermal Diffusivity, mm2/s 0.79 to 1.1
1.0