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Steatite vs. Cordierite

Both steatite and cordierite are oxide-based engineering ceramics. There are 19 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is steatite and the bottom bar is cordierite.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 540 to 620
420
Elastic (Young's, Tensile) Modulus, GPa 68 to 120
62
Flexural Strength, MPa 32 to 150
17 to 32
Tensile Strength: Ultimate (UTS), MPa 60 to 220
190

Thermal Properties

Maximum Temperature: Mechanical, °C 750 to 1230
1150
Maximum Thermal Shock, °C 90 to 160
290 to 390
Specific Heat Capacity, J/kg-K 850 to 860
800 to 850
Thermal Conductivity, W/m-K 1.8 to 2.5
1.3 to 1.7
Thermal Expansion, µm/m-K 7.0 to 9.0
2.9 to 4.8

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.7 to 6.5
4.7
Dielectric Strength (Breakdown Potential), kV/mm 7.9 to 16
7.7
Electrical Resistivity Order of Magnitude, 10x Ω-m 8.0 to 11
9.5

Otherwise Unclassified Properties

Density, g/cm3 1.9 to 2.8
2.0 to 2.2

Common Calculations

Stiffness to Weight: Axial, points 14 to 32
15 to 17
Stiffness to Weight: Bending, points 52 to 83
59 to 67
Strength to Weight: Axial, points 6.4 to 32
24 to 27
Strength to Weight: Bending, points 13 to 42
33 to 38
Thermal Diffusivity, mm2/s 0.79 to 1.1
0.74 to 1.0
Thermal Shock Resistance, points 5.1 to 33
47 to 78