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R30155 Cobalt vs. SAE-AISI L3 Steel

Both R30155 cobalt and SAE-AISI L3 steel are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is SAE-AISI L3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 850
600 to 2250

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
43
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.5
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
1.9
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 300
53

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
21 to 80
Strength to Weight: Bending, points 24
20 to 49
Thermal Diffusivity, mm2/s 3.2
12
Thermal Shock Resistance, points 21
18 to 67

Alloy Composition

Carbon (C), % 0.080 to 0.16
1.0 to 1.1
Chromium (Cr), % 20 to 22.5
1.3 to 1.7
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
95.5 to 97.3
Manganese (Mn), % 1.0 to 2.0
0.25 to 0.8
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.1 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0.1 to 0.3