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R30021 Cobalt vs. EN 2.4964 Cobalt

Both R30021 cobalt and EN 2.4964 cobalt are cobalt alloys. They have 77% 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 R30021 cobalt and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 9.0
40
Fatigue Strength, MPa 250
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
86
Tensile Strength: Ultimate (UTS), MPa 700
960
Tensile Strength: Yield (Proof), MPa 500
390

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Melting Completion (Liquidus), °C 1350
1630
Melting Onset (Solidus), °C 1190
1550
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 11
12

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.6
Embodied Carbon, kg CO2/kg material 8.0
9.8
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 520
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
310
Resilience: Unit (Modulus of Resilience), kJ/m3 570
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 23
28
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 3.8
3.9
Thermal Shock Resistance, points 21
25

Alloy Composition

Carbon (C), % 0.2 to 0.35
0.050 to 0.15
Chromium (Cr), % 26 to 29
19 to 21
Cobalt (Co), % 61.7 to 67.3
46.4 to 58
Iron (Fe), % 0 to 3.0
0 to 3.0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
9.0 to 11
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.5
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
14 to 16