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EN 2.4964 Cobalt vs. S35135 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S35135 stainless steel belongs to the iron alloys. They have a modest 32% 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 (9, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is S35135 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 220
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
79
Tensile Strength: Ultimate (UTS), MPa 960
590
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1630
1430
Melting Onset (Solidus), °C 1550
1380
Specific Heat Capacity, J/kg-K 400
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.1
Embodied Carbon, kg CO2/kg material 9.8
6.8
Embodied Energy, MJ/kg 140
94
Embodied Water, L/kg 450
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
160
Resilience: Unit (Modulus of Resilience), kJ/m3 340
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 28
20
Strength to Weight: Bending, points 23
19
Thermal Shock Resistance, points 25
13

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.080
Chromium (Cr), % 19 to 21
20 to 25
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 3.0
28.3 to 45
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
4.0 to 4.8
Nickel (Ni), % 9.0 to 11
30 to 38
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.4
0.6 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.4 to 1.0
Tungsten (W), % 14 to 16
0