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R30012 Cobalt vs. SAE-AISI L3 Steel

R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI L3 steel belongs to the iron alloys. There are 22 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 SAE-AISI L3 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
72
Tensile Strength: Ultimate (UTS), MPa 830
600 to 2250

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1280
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 15
43
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.5

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.9
Embodied Energy, MJ/kg 120
27
Embodied Water, L/kg 480
53

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
21 to 80
Strength to Weight: Bending, points 22
20 to 49
Thermal Diffusivity, mm2/s 3.8
12
Thermal Shock Resistance, points 23
18 to 67

Alloy Composition

Carbon (C), % 1.4 to 2.0
1.0 to 1.1
Chromium (Cr), % 27 to 32
1.3 to 1.7
Cobalt (Co), % 47.5 to 64.1
0
Iron (Fe), % 0 to 3.0
95.5 to 97.3
Manganese (Mn), % 0
0.25 to 0.8
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
0.1 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 7.5 to 9.5
0
Vanadium (V), % 0
0.1 to 0.3