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EN 2.4964 Cobalt vs. S32615 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S32615 stainless steel belongs to the iron alloys. They have a modest 31% 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 S32615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 40
28
Fatigue Strength, MPa 220
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 960
620
Tensile Strength: Yield (Proof), MPa 390
250

Thermal Properties

Latent Heat of Fusion, J/g 290
370
Melting Completion (Liquidus), °C 1630
1350
Melting Onset (Solidus), °C 1550
1310
Specific Heat Capacity, J/kg-K 400
500
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.6
Embodied Carbon, kg CO2/kg material 9.8
4.4
Embodied Energy, MJ/kg 140
63
Embodied Water, L/kg 450
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
140
Resilience: Unit (Modulus of Resilience), kJ/m3 340
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
23
Strength to Weight: Bending, points 23
21
Thermal Shock Resistance, points 25
15

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.070
Chromium (Cr), % 19 to 21
16.5 to 19.5
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 0 to 3.0
46.4 to 57.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
0.3 to 1.5
Nickel (Ni), % 9.0 to 11
19 to 22
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.4
4.8 to 6.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
0