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EN 2.4964 Cobalt vs. S40975 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S40975 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 40
22
Fatigue Strength, MPa 220
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 960
460
Tensile Strength: Yield (Proof), MPa 390
310

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1630
1450
Melting Onset (Solidus), °C 1550
1400
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
3.3

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
2.0
Embodied Energy, MJ/kg 140
28
Embodied Water, L/kg 450
95

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
93
Resilience: Unit (Modulus of Resilience), kJ/m3 340
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
17
Strength to Weight: Bending, points 23
17
Thermal Diffusivity, mm2/s 3.9
7.0
Thermal Shock Resistance, points 25
17

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 19 to 21
10.5 to 11.7
Cobalt (Co), % 46.4 to 58
0
Iron (Fe), % 0 to 3.0
84.4 to 89
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 11
0.5 to 1.0
Nitrogen (N), % 0
0 to 0.030
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 to 0.75
Tungsten (W), % 14 to 16
0