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R30012 Cobalt vs. SAE-AISI H22 Steel

R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI H22 steel belongs to the iron 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 R30012 cobalt and the bottom bar is SAE-AISI H22 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 830
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1470
1670
Melting Onset (Solidus), °C 1280
1620
Specific Heat Capacity, J/kg-K 440
440
Thermal Conductivity, W/m-K 15
31
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.7
Embodied Carbon, kg CO2/kg material 8.3
4.9
Embodied Energy, MJ/kg 120
73
Embodied Water, L/kg 480
72

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 26
22 to 61
Strength to Weight: Bending, points 22
20 to 39
Thermal Diffusivity, mm2/s 3.8
8.2
Thermal Shock Resistance, points 23
22 to 60

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.3 to 0.4
Chromium (Cr), % 27 to 32
1.8 to 3.8
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
82.2 to 87.4
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 7.5 to 9.5
10 to 11.8
Vanadium (V), % 0
0.25 to 0.5