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EN 2.4964 Cobalt vs. R31233 Cobalt

Both EN 2.4964 cobalt and R31233 cobalt are cobalt alloys. They have 86% of their average alloy composition in common.

For each property being compared, the top bar is EN 2.4964 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, % 40
17
Fatigue Strength, MPa 220
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
85
Tensile Strength: Ultimate (UTS), MPa 960
1020
Tensile Strength: Yield (Proof), MPa 390
420

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1630
1350
Melting Onset (Solidus), °C 1550
1330
Specific Heat Capacity, J/kg-K 400
440
Thermal Conductivity, W/m-K 15
12
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
8.6
Embodied Carbon, kg CO2/kg material 9.8
8.4
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 450
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
140
Resilience: Unit (Modulus of Resilience), kJ/m3 340
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 28
33
Strength to Weight: Bending, points 23
26
Thermal Diffusivity, mm2/s 3.9
3.2
Thermal Shock Resistance, points 25
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.050 to 0.15
0.020 to 0.1
Chromium (Cr), % 19 to 21
23.5 to 27.5
Cobalt (Co), % 46.4 to 58
44.7 to 63.3
Iron (Fe), % 0 to 3.0
1.0 to 5.0
Manganese (Mn), % 0 to 2.0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 9.0 to 11
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 0.4
0.050 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 14 to 16
1.0 to 3.0