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R30012 Cobalt vs. ACI-ASTM CA15 Steel

R30012 cobalt belongs to the cobalt alloys classification, while ACI-ASTM CA15 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is ACI-ASTM CA15 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
21
Fatigue Strength, MPa 320
370
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 830
700
Tensile Strength: Yield (Proof), MPa 650
570

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1280
1500
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
3.5

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.0
Embodied Energy, MJ/kg 120
28
Embodied Water, L/kg 480
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
140
Resilience: Unit (Modulus of Resilience), kJ/m3 960
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26
25
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 3.8
6.7
Thermal Shock Resistance, points 23
26

Alloy Composition

Carbon (C), % 1.4 to 2.0
0 to 0.15
Chromium (Cr), % 27 to 32
11.5 to 14
Cobalt (Co), % 47.5 to 64.1
0
Iron (Fe), % 0 to 3.0
81.8 to 88.5
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 0 to 3.0
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Tungsten (W), % 7.5 to 9.5
0