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R30012 Cobalt vs. SAE-AISI 1012 Steel

R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1012 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is SAE-AISI 1012 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
21 to 31
Fatigue Strength, MPa 320
150 to 230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 830
360 to 400
Tensile Strength: Yield (Proof), MPa 650
200 to 330

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1280
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 15
53
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
7.9

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 120
18
Embodied Water, L/kg 480
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
80 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 960
110 to 300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
13 to 14
Strength to Weight: Bending, points 22
14 to 15
Thermal Diffusivity, mm2/s 3.8
14
Thermal Shock Resistance, points 23
11 to 13

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.1 to 0.15
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Iron (Fe), % 0 to 3.0
99.16 to 99.6
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0
0 to 0.050
Tungsten (W), % 7.5 to 9.5
0