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R31233 Cobalt vs. N08031 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while N08031 stainless steel belongs to the iron alloys. They have 44% of their average alloy composition in common. There are 25 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 R31233 cobalt and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 17
45
Fatigue Strength, MPa 220
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
81
Tensile Strength: Ultimate (UTS), MPa 1020
730
Tensile Strength: Yield (Proof), MPa 420
310

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
12
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 8.4
7.1
Embodied Energy, MJ/kg 110
96
Embodied Water, L/kg 480
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
270
Resilience: Unit (Modulus of Resilience), kJ/m3 410
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
25
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 3.2
3.1
Thermal Shock Resistance, points 25
14

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.015
Chromium (Cr), % 23.5 to 27.5
26 to 28
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
1.0 to 1.4
Iron (Fe), % 1.0 to 5.0
29 to 36.9
Manganese (Mn), % 0.1 to 1.5
0 to 2.0
Molybdenum (Mo), % 4.0 to 6.0
6.0 to 7.0
Nickel (Ni), % 7.0 to 11
30 to 32
Nitrogen (N), % 0.030 to 0.12
0.15 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.050 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.020
0 to 0.010
Tungsten (W), % 1.0 to 3.0
0