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R31233 Cobalt vs. R31538 Cobalt

Both R31233 cobalt and R31538 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 R31233 cobalt and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 17
13 to 23
Fatigue Strength, MPa 220
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
86
Tensile Strength: Ultimate (UTS), MPa 1020
1020 to 1360
Tensile Strength: Yield (Proof), MPa 420
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1350
1360
Melting Onset (Solidus), °C 1330
1290
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 12
13
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 8.6
8.4
Embodied Carbon, kg CO2/kg material 8.4
8.1
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 480
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 410
750 to 1920
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
34 to 45
Strength to Weight: Bending, points 26
27 to 32
Thermal Diffusivity, mm2/s 3.2
3.5
Thermal Shock Resistance, points 25
25 to 33

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.15 to 0.35
Chromium (Cr), % 23.5 to 27.5
26 to 30
Cobalt (Co), % 44.7 to 63.3
58.7 to 68.9
Iron (Fe), % 1.0 to 5.0
0 to 0.75
Manganese (Mn), % 0.1 to 1.5
0 to 1.0
Molybdenum (Mo), % 4.0 to 6.0
5.0 to 7.0
Nickel (Ni), % 7.0 to 11
0 to 1.0
Nitrogen (N), % 0.030 to 0.12
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.050 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0
Tungsten (W), % 1.0 to 3.0
0