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S66286 Stainless Steel vs. EN 2.4964 Cobalt

S66286 stainless steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have a modest 28% 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 (5, in this case) are not shown.

For each property being compared, the top bar is S66286 stainless steel and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 17 to 40
40
Fatigue Strength, MPa 240 to 410
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 620 to 1020
960
Tensile Strength: Yield (Proof), MPa 280 to 670
390

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1430
1630
Melting Onset (Solidus), °C 1370
1550
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
12

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 7.9
9.6
Embodied Carbon, kg CO2/kg material 6.0
9.8
Embodied Energy, MJ/kg 87
140
Embodied Water, L/kg 170
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 200
310
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 1150
340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 22 to 36
28
Strength to Weight: Bending, points 20 to 28
23
Thermal Diffusivity, mm2/s 4.0
3.9
Thermal Shock Resistance, points 13 to 22
25

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0 to 0.080
0.050 to 0.15
Chromium (Cr), % 13.5 to 16
19 to 21
Cobalt (Co), % 0
46.4 to 58
Iron (Fe), % 49.1 to 59.5
0 to 3.0
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 1.0 to 1.5
0
Nickel (Ni), % 24 to 27
9.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 1.9 to 2.4
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0.1 to 0.5
0