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R31539 Cobalt vs. R31233 Cobalt

Both R31539 cobalt and R31233 cobalt are cobalt alloys. They have 87% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 13 to 22
17
Fatigue Strength, MPa 310 to 480
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
85
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
1020
Tensile Strength: Yield (Proof), MPa 590 to 940
420

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1350
Melting Onset (Solidus), °C 1290
1330
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 8.2
8.4
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 530
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
33
Strength to Weight: Bending, points 27 to 32
26
Thermal Diffusivity, mm2/s 3.5
3.2
Thermal Shock Resistance, points 24 to 32
25

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.14
0.020 to 0.1
Chromium (Cr), % 26 to 30
23.5 to 27.5
Cobalt (Co), % 57.7 to 68.7
44.7 to 63.3
Iron (Fe), % 0 to 0.75
1.0 to 5.0
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.1 to 1.5
Molybdenum (Mo), % 5.0 to 7.0
4.0 to 6.0
Nickel (Ni), % 0 to 1.0
7.0 to 11
Nitrogen (N), % 0 to 0.25
0.030 to 0.12
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0.050 to 1.0
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 0
1.0 to 3.0