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ACI-ASTM CA40 Steel vs. Borosilicate Glass

ACI-ASTM CA40 steel and borosilicate glass belong to fundamentally different material chemistries. ACI-ASTM CA40 steel is a metal, while borosilicate glass is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (30, 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 borosilicate glass.

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

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
67 to 80
Poisson's Ratio 0.28
0.21
Tensile Strength: Ultimate (UTS), MPa 910
280

Thermal Properties

Maximum Temperature: Mechanical, °C 750
360
Melting Onset (Solidus), °C 1500
560
Specific Heat Capacity, J/kg-K 480
830
Thermal Conductivity, W/m-K 25
1.2
Thermal Expansion, µm/m-K 10
3.3 to 5.1

Otherwise Unclassified Properties

Density, g/cm3 7.7
2.2 to 2.6

Common Calculations

Stiffness to Weight: Axial, points 14
15 to 17
Stiffness to Weight: Bending, points 25
55 to 61
Strength to Weight: Axial, points 33
30 to 35
Strength to Weight: Bending, points 27
36 to 43
Thermal Diffusivity, mm2/s 6.7
0.54 to 0.63
Thermal Shock Resistance, points 33
50 to 91