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Grade 35 Cast Iron vs. Granite

Grade 35 cast iron and granite belong to fundamentally different material chemistries. Grade 35 cast iron is a metal, while granite 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 (20, 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 grade 35 cast iron and the bottom bar is granite.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 860
2200
Elastic (Young's, Tensile) Modulus, GPa 180
70
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 69
27
Tensile Strength: Ultimate (UTS), MPa 250
39

Thermal Properties

Specific Heat Capacity, J/kg-K 490
840
Thermal Conductivity, W/m-K 46
2.7
Thermal Expansion, µm/m-K 11
7.4

Otherwise Unclassified Properties

Density, g/cm3 7.5
2.9

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
48
Strength to Weight: Axial, points 9.2
3.8
Strength to Weight: Bending, points 12
9.0
Thermal Diffusivity, mm2/s 13
1.1
Thermal Shock Resistance, points 9.5
5.4