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SAE-AISI H24 Steel vs. R30012 Cobalt

SAE-AISI H24 steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H24 steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
86
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
830

Thermal Properties

Latent Heat of Fusion, J/g 240
320
Melting Completion (Liquidus), °C 1750
1470
Melting Onset (Solidus), °C 1700
1280
Specific Heat Capacity, J/kg-K 420
440
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.8
Embodied Carbon, kg CO2/kg material 6.1
8.3
Embodied Energy, MJ/kg 93
120
Embodied Water, L/kg 78
480

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 22 to 61
26
Strength to Weight: Bending, points 20 to 39
22
Thermal Diffusivity, mm2/s 6.9
3.8
Thermal Shock Resistance, points 22 to 61
23

Alloy Composition

Carbon (C), % 0.42 to 0.53
1.4 to 2.0
Chromium (Cr), % 2.5 to 3.5
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78 to 82.4
0 to 3.0
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.4
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 14 to 16
7.5 to 9.5
Vanadium (V), % 0.4 to 0.6
0