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EN 2.4964 Cobalt vs. R31539 Cobalt

Both EN 2.4964 cobalt and R31539 cobalt are cobalt alloys. They have 74% 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 EN 2.4964 cobalt and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 40
13 to 22
Fatigue Strength, MPa 220
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
86
Tensile Strength: Ultimate (UTS), MPa 960
1000 to 1340
Tensile Strength: Yield (Proof), MPa 390
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1630
1360
Melting Onset (Solidus), °C 1550
1290
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.1

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.4
Embodied Carbon, kg CO2/kg material 9.8
8.2
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 450
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 340
780 to 2000
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 28
33 to 44
Strength to Weight: Bending, points 23
27 to 32
Thermal Diffusivity, mm2/s 3.9
3.5
Thermal Shock Resistance, points 25
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0.050 to 0.15
0 to 0.14
Chromium (Cr), % 19 to 21
26 to 30
Cobalt (Co), % 46.4 to 58
57.7 to 68.7
Iron (Fe), % 0 to 3.0
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 9.0 to 11
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 14 to 16
0