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R30001 Cobalt vs. N08320 Stainless Steel

R30001 cobalt belongs to the cobalt alloys classification, while N08320 stainless steel belongs to the iron alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 R30001 cobalt and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
40
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
78
Tensile Strength: Ultimate (UTS), MPa 620
580

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1530
1400
Melting Onset (Solidus), °C 1260
1350
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.0

Otherwise Unclassified Properties

Density, g/cm3 9.0
8.0
Embodied Carbon, kg CO2/kg material 8.9
4.9
Embodied Energy, MJ/kg 130
69
Embodied Water, L/kg 460
200

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 19
20
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 3.7
3.3
Thermal Shock Resistance, points 19
13

Alloy Composition

Carbon (C), % 2.0 to 3.0
0 to 0.050
Chromium (Cr), % 28 to 32
21 to 23
Cobalt (Co), % 43 to 59
0
Iron (Fe), % 0 to 3.0
40.4 to 50
Manganese (Mn), % 0
0 to 2.5
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
25 to 27
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 11 to 13
0