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EN 2.4964 Cobalt vs. EN 1.4424 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while EN 1.4424 stainless steel belongs to the iron alloys. They have a modest 26% 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 (7, 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 1.4424 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
28
Fatigue Strength, MPa 220
350 to 370
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
78
Tensile Strength: Ultimate (UTS), MPa 960
800
Tensile Strength: Yield (Proof), MPa 390
480 to 500

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Melting Completion (Liquidus), °C 1630
1430
Melting Onset (Solidus), °C 1550
1390
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.7
Embodied Carbon, kg CO2/kg material 9.8
3.4
Embodied Energy, MJ/kg 140
46
Embodied Water, L/kg 450
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
190 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 340
580 to 640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
29
Strength to Weight: Bending, points 23
25
Thermal Diffusivity, mm2/s 3.9
3.5
Thermal Shock Resistance, points 25
23

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 19 to 21
18 to 19
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
68.6 to 72.4
Manganese (Mn), % 0 to 2.0
1.2 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 9.0 to 11
4.5 to 5.2
Nitrogen (N), % 0
0.050 to 0.1
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
1.4 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 14 to 16
0