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EN 2.4964 Cobalt vs. S21460 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S21460 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 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is S21460 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
46
Fatigue Strength, MPa 220
390
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 960
830
Tensile Strength: Yield (Proof), MPa 390
430

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1630
1380
Melting Onset (Solidus), °C 1550
1330
Specific Heat Capacity, J/kg-K 400
480
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.6
Embodied Carbon, kg CO2/kg material 9.8
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 450
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
320
Resilience: Unit (Modulus of Resilience), kJ/m3 340
460
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
30
Strength to Weight: Bending, points 23
26
Thermal Shock Resistance, points 25
17

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.12
Chromium (Cr), % 19 to 21
17 to 19
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
57.3 to 63.7
Manganese (Mn), % 0 to 2.0
14 to 16
Nickel (Ni), % 9.0 to 11
5.0 to 6.0
Nitrogen (N), % 0
0.35 to 0.5
Phosphorus (P), % 0 to 0.020
0 to 0.060
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
0