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R30012 Cobalt vs. SAE-AISI H12 Steel

R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI H12 steel belongs to the iron alloys. There are 22 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 R30012 cobalt and the bottom bar is SAE-AISI H12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 830
690 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1470
1480
Melting Onset (Solidus), °C 1280
1440
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 15
36
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
9.5

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.9
Embodied Carbon, kg CO2/kg material 8.3
2.9
Embodied Energy, MJ/kg 120
41
Embodied Water, L/kg 480
76

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
24 to 65
Strength to Weight: Bending, points 22
22 to 42
Thermal Diffusivity, mm2/s 3.8
9.8
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
4.8 to 5.5
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
87.8 to 91.7
Manganese (Mn), % 0
0.2 to 0.5
Molybdenum (Mo), % 0 to 1.0
1.3 to 1.8
Nickel (Ni), % 0 to 3.0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
0.8 to 1.2
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 7.5 to 9.5
1.0 to 1.7
Vanadium (V), % 0
0 to 0.5