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Steatite L-5

Steatite L-5 is a grade of steatite. It has the second lowest strength compared to the other variants of steatite. The graph bars on the material properties cards below compare steatite L-5 to other oxide-based engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Thermal Properties

Maximum Temperature: Mechanical

840 °C 1550 °F

Maximum Thermal Shock

160 °C 330 °F

Specific Heat Capacity

860 J/kg-K 0.2 BTU/lb-°F

Thermal Conductivity

2.5 W/m-K 1.5 BTU/h-ft-°F

Thermal Expansion

7.8 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz


Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

16 kV/mm 0.61 V/mil

Electrical Dissipation At 1 Hz


Electrical Dissipation At 1 MHz


Electrical Resistivity Order of Magnitude

8.0 10x Ω-m

Other Material Properties

Compressive (Crushing) Strength

570 MPa 82 x 103 psi


2.8 g/cm3 170 lb/ft3

Elastic (Young's, Tensile) Modulus

120 GPa 17 x 106 psi

Flexural Strength

140 MPa 21 x 103 psi

Poisson's Ratio


Tensile Strength: Ultimate (UTS)

67 MPa 9.6 x 103 psi

Common Calculations

Stiffness to Weight: Axial

24 points

Stiffness to Weight: Bending

59 points

Strength to Weight: Axial

6.7 points

Strength to Weight: Bending

13 points

Thermal Diffusivity

1.1 mm2/s

Thermal Shock Resistance

5.1 points

Followup Questions

Further Reading

ASTM C242: Standard Terminology of Ceramic Whitewares and Related Products

Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012

IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015