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ACI-ASTM CA40 Steel vs. Fused Silica

ACI-ASTM CA40 steel and fused silica belong to fundamentally different material chemistries. ACI-ASTM CA40 steel is a metal, while fused silica is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 16 material properties with values for both materials. Properties with values for just one material (26, 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 fused silica.

ACI-ASTM CA40 (SCS2A, J91153) Cast Stainless SteelFused Silica (Fused Quartz)
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
73
Poisson's Ratio 0.28
0.17
Shear Modulus, GPa 76
31
Tensile Strength: Ultimate (UTS), MPa 910
50

Thermal Properties

Maximum Temperature: Mechanical, °C 750
1080
Melting Onset (Solidus), °C 1500
1900
Specific Heat Capacity, J/kg-K 480
720
Thermal Conductivity, W/m-K 25
1.4
Thermal Expansion, µm/m-K 10
0.5

Otherwise Unclassified Properties

Density, g/cm3 7.7
2.2

Common Calculations

Stiffness to Weight: Axial, points 14
18
Stiffness to Weight: Bending, points 25
63
Strength to Weight: Axial, points 33
6.3
Strength to Weight: Bending, points 27
14
Thermal Diffusivity, mm2/s 6.7
0.85
Thermal Shock Resistance, points 33
97