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EN 2.4964 Cobalt vs. ACI-ASTM CB7Cu-1 Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while ACI-ASTM CB7Cu-1 steel belongs to the iron alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 40
5.7 to 11
Fatigue Strength, MPa 220
420 to 590
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 960
960 to 1350
Tensile Strength: Yield (Proof), MPa 390
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1630
1430
Melting Onset (Solidus), °C 1550
1500
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.3

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
2.6
Embodied Energy, MJ/kg 140
38
Embodied Water, L/kg 450
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 340
1500 to 3590
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
34 to 48
Strength to Weight: Bending, points 23
28 to 35
Thermal Diffusivity, mm2/s 3.9
4.6
Thermal Shock Resistance, points 25
32 to 45

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.070
Chromium (Cr), % 19 to 21
15.5 to 17.7
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
2.5 to 3.2
Iron (Fe), % 0 to 3.0
72.3 to 78.4
Manganese (Mn), % 0 to 2.0
0 to 0.7
Nickel (Ni), % 9.0 to 11
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
0