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Alumina vs. Grade 250 Maraging Steel

Alumina and grade 250 maraging steel belong to fundamentally different material chemistries. Alumina is a ceramic material, while grade 250 maraging steel is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 13 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 alumina and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1920 to 2750
730 to 1660
Elastic (Young's, Tensile) Modulus, GPa 220 to 370
190
Poisson's Ratio 0.22 to 0.24
0.3
Tensile Strength: Ultimate (UTS), MPa 210 to 290
970 to 1800

Thermal Properties

Melting Onset (Solidus), °C 2040
1430
Specific Heat Capacity, J/kg-K 870 to 940
450
Thermal Expansion, µm/m-K 6.7 to 8.2
12

Otherwise Unclassified Properties

Density, g/cm3 3.4 to 4.1
8.2

Common Calculations

Stiffness to Weight: Axial, points 35 to 53
13
Stiffness to Weight: Bending, points 57 to 62
23
Strength to Weight: Axial, points 14 to 23
33 to 61
Strength to Weight: Bending, points 19 to 28
26 to 40
Thermal Shock Resistance, points 4.9 to 14
29 to 54