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EN 2.4964 Cobalt vs. EN 1.4057 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while EN 1.4057 stainless steel belongs to the iron alloys. They have a modest 21% 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 (6, 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 1.4057 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
11 to 17
Fatigue Strength, MPa 220
320 to 430
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 960
840 to 980
Tensile Strength: Yield (Proof), MPa 390
530 to 790

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1630
1440
Melting Onset (Solidus), °C 1550
1390
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.9

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.7
Embodied Carbon, kg CO2/kg material 9.8
2.2
Embodied Energy, MJ/kg 140
32
Embodied Water, L/kg 450
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
96 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 340
700 to 1610
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
30 to 35
Strength to Weight: Bending, points 23
26 to 28
Thermal Diffusivity, mm2/s 3.9
6.7
Thermal Shock Resistance, points 25
30 to 35

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.12 to 0.22
Chromium (Cr), % 19 to 21
15 to 17
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
77.7 to 83.4
Manganese (Mn), % 0 to 2.0
0 to 1.5
Nickel (Ni), % 9.0 to 11
1.5 to 2.5
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 14 to 16
0