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EN 2.4964 Cobalt vs. S30600 Stainless Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while S30600 stainless steel belongs to the iron alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. 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 S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 40
45
Fatigue Strength, MPa 220
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 960
610
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 290
350
Melting Completion (Liquidus), °C 1630
1380
Melting Onset (Solidus), °C 1550
1330
Specific Heat Capacity, J/kg-K 400
490
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.6
Embodied Carbon, kg CO2/kg material 9.8
3.6
Embodied Energy, MJ/kg 140
51
Embodied Water, L/kg 450
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
220
Resilience: Unit (Modulus of Resilience), kJ/m3 340
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 3.9
3.7
Thermal Shock Resistance, points 25
14

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.018
Chromium (Cr), % 19 to 21
17 to 18.5
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 3.0
58.9 to 65.3
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 9.0 to 11
14 to 15.5
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 0.4
3.7 to 4.3
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 14 to 16
0