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Grade 350 Maraging Steel vs. CVD Diamond

Grade 350 maraging steel and CVD diamond belong to fundamentally different material chemistries. Grade 350 maraging steel is a metal, while CVD diamond is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (23, 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 350 maraging steel and the bottom bar is CVD diamond.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
1050
Poisson's Ratio 0.3
0.1
Tensile Strength: Ultimate (UTS), MPa 1140 to 2420
750

Thermal Properties

Specific Heat Capacity, J/kg-K 450
500
Thermal Expansion, µm/m-K 12
1.0

Otherwise Unclassified Properties

Density, g/cm3 8.2
3.5

Common Calculations

Stiffness to Weight: Axial, points 13
170
Stiffness to Weight: Bending, points 23
96
Strength to Weight: Axial, points 38 to 82
59
Strength to Weight: Bending, points 29 to 49
52
Thermal Shock Resistance, points 35 to 74
51