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EN 2.4964 Cobalt vs. EN 1.8821 Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while EN 1.8821 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is EN 1.8821 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 40
25
Fatigue Strength, MPa 220
280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 960
530
Tensile Strength: Yield (Proof), MPa 390
390

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1630
1460
Melting Onset (Solidus), °C 1550
1420
Specific Heat Capacity, J/kg-K 400
470
Thermal Conductivity, W/m-K 15
49
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.3

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
1.6
Embodied Energy, MJ/kg 140
21
Embodied Water, L/kg 450
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
120
Resilience: Unit (Modulus of Resilience), kJ/m3 340
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 3.9
13
Thermal Shock Resistance, points 25
16

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.030
Carbon (C), % 0.050 to 0.15
0 to 0.14
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
96.8 to 99.98
Manganese (Mn), % 0 to 2.0
0 to 1.6
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 9.0 to 11
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0
0 to 0.1