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EN 2.4964 Cobalt vs. S44735 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S44735 stainless 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 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is S44735 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 40
21
Fatigue Strength, MPa 220
300
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 86
82
Tensile Strength: Ultimate (UTS), MPa 960
630
Tensile Strength: Yield (Proof), MPa 390
460

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Melting Completion (Liquidus), °C 1630
1460
Melting Onset (Solidus), °C 1550
1420
Specific Heat Capacity, J/kg-K 400
480
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.7
Embodied Carbon, kg CO2/kg material 9.8
4.4
Embodied Energy, MJ/kg 140
61
Embodied Water, L/kg 450
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
120
Resilience: Unit (Modulus of Resilience), kJ/m3 340
520
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 21
26
Strength to Weight: Axial, points 28
23
Strength to Weight: Bending, points 23
21
Thermal Shock Resistance, points 25
20

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 19 to 21
28 to 30
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
60.7 to 68.4
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.6 to 4.2
Nickel (Ni), % 9.0 to 11
0 to 1.0
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.045
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 0.030
Titanium (Ti), % 0
0.2 to 1.0
Tungsten (W), % 14 to 16
0