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R30035 Cobalt vs. S41041 Stainless Steel

R30035 cobalt belongs to the cobalt alloys classification, while S41041 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30035 cobalt and the bottom bar is S41041 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220 to 230
190
Elongation at Break, % 9.0 to 46
17
Fatigue Strength, MPa 170 to 740
350
Poisson's Ratio 0.29
0.28
Reduction in Area, % 40 to 74
56
Shear Modulus, GPa 84 to 89
76
Tensile Strength: Ultimate (UTS), MPa 900 to 1900
910
Tensile Strength: Yield (Proof), MPa 300 to 1650
580

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1320
1410
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
29
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 100
8.5
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 10
2.2
Embodied Energy, MJ/kg 140
31
Embodied Water, L/kg 410
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 320
140
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 5920
860
Stiffness to Weight: Axial, points 14 to 15
14
Stiffness to Weight: Bending, points 23 to 24
25
Strength to Weight: Axial, points 29 to 61
32
Strength to Weight: Bending, points 24 to 39
27
Thermal Diffusivity, mm2/s 3.0
7.8
Thermal Shock Resistance, points 23 to 46
33

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0 to 0.015
0
Carbon (C), % 0 to 0.025
0.13 to 0.18
Chromium (Cr), % 19 to 21
11.5 to 13
Cobalt (Co), % 29.1 to 39
0
Iron (Fe), % 0 to 1.0
84.5 to 87.8
Manganese (Mn), % 0 to 0.15
0.4 to 0.6
Molybdenum (Mo), % 9.0 to 10.5
0 to 0.2
Nickel (Ni), % 33 to 37
0 to 0.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.15
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 1.0
0