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MDF vs. Automotive Grey Cast Iron

MDF and automotive grey cast iron belong to fundamentally different material chemistries. MDF is a polymeric material, while automotive grey cast iron is a metal. 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 (15, 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 MDF and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 4.0
180
Elongation at Break, % 0.5
9.6 to 14
Poisson's Ratio 0.25
0.29
Shear Modulus, GPa 2.5
69 to 70
Tensile Strength: Ultimate (UTS), MPa 18
140 to 290

Thermal Properties

Specific Heat Capacity, J/kg-K 1700
490
Thermal Conductivity, W/m-K 0.3
41 to 43
Thermal Expansion, µm/m-K 12
12 to 14

Otherwise Unclassified Properties

Density, g/cm3 0.75
7.5 to 7.6

Common Calculations

Stiffness to Weight: Axial, points 3.0
13
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 6.7
5.2 to 11
Strength to Weight: Bending, points 20
8.0 to 13
Thermal Diffusivity, mm2/s 0.24
11 to 12
Thermal Shock Resistance, points 27
4.2 to 8.6