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R30816 Cobalt vs. SAE-AISI H24 Steel

R30816 cobalt belongs to the cobalt alloys classification, while SAE-AISI H24 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is SAE-AISI H24 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 1020
720 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 300
240
Melting Completion (Liquidus), °C 1540
1750
Melting Onset (Solidus), °C 1460
1700
Specific Heat Capacity, J/kg-K 420
420
Thermal Conductivity, W/m-K 13
27
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.1
9.1
Embodied Carbon, kg CO2/kg material 20
6.1
Embodied Energy, MJ/kg 320
93
Embodied Water, L/kg 440
78

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 22
22
Strength to Weight: Axial, points 31
22 to 61
Strength to Weight: Bending, points 25
20 to 39
Thermal Diffusivity, mm2/s 3.3
6.9
Thermal Shock Resistance, points 28
22 to 61

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.42 to 0.53
Chromium (Cr), % 19 to 21
2.5 to 3.5
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 5.0
78 to 82.4
Manganese (Mn), % 1.0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0 to 0.3
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
14 to 16
Vanadium (V), % 0
0.4 to 0.6