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ACI-ASTM CA40 Steel vs. Low Expansion Glass-ceramic

ACI-ASTM CA40 steel and low expansion glass-ceramic belong to fundamentally different material chemistries. ACI-ASTM CA40 steel is a metal, while low expansion glass-ceramic is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 14 material properties with values for both materials. Properties with values for just one material (24, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is low expansion glass-ceramic.

ACI-ASTM CA40 (SCS2A, J91153) Cast Stainless SteelLow Expansion Glass-Ceramic
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
83
Poisson's Ratio 0.28
0.22
Tensile Strength: Ultimate (UTS), MPa 910
53

Thermal Properties

Maximum Temperature: Mechanical, °C 750
690
Specific Heat Capacity, J/kg-K 480
800
Thermal Conductivity, W/m-K 25
1.5
Thermal Expansion, µm/m-K 10
1.7

Otherwise Unclassified Properties

Density, g/cm3 7.7
2.4

Common Calculations

Stiffness to Weight: Axial, points 14
19
Stiffness to Weight: Bending, points 25
59
Strength to Weight: Axial, points 33
6.1
Strength to Weight: Bending, points 27
13
Thermal Diffusivity, mm2/s 6.7
0.76
Thermal Shock Resistance, points 33
28