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
0.23
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
Density
2.7 g/cm3 170 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 MHz
5.9
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