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Steatite L-4

Steatite L-4 is a grade of steatite. The graph bars on the material properties cards below compare steatite L-4 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.

Mechanical Properties

Compressive (Crushing) Strength

620 MPa 90 x 103 psi

Elastic (Young's, Tensile) Modulus

80 GPa 12 x 106 psi

Flexural Strength

150 MPa 21 x 103 psi

Poisson's Ratio


Tensile Strength: Ultimate (UTS)

69 MPa 10 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

1230 °C 2240 °F

Maximum Thermal Shock

100 °C 210 °F

Specific Heat Capacity

860 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

2.5 W/m-K 1.4 BTU/h-ft-°F

Thermal Expansion

8.2 µm/m-K

Other Material Properties


2.7 g/cm3 170 lb/ft3

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

8.9 kV/mm 0.35 V/mil

Electrical Resistivity Order of Magnitude

11 10x Ω-m

Common Calculations

Stiffness to Weight: Axial

16 points

Stiffness to Weight: Bending

53 points

Strength to Weight: Axial

7.1 points

Strength to Weight: Bending

14 points

Thermal Diffusivity

1.1 mm2/s

Thermal Shock Resistance

7.5 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

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