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R31233 Cobalt vs. S46910 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while S46910 stainless steel belongs to the iron alloys. They have a modest 29% 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 (11, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is S46910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 17
2.2 to 11
Fatigue Strength, MPa 220
250 to 1020
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
76
Tensile Strength: Ultimate (UTS), MPa 1020
680 to 2470
Tensile Strength: Yield (Proof), MPa 420
450 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.9
Embodied Carbon, kg CO2/kg material 8.4
4.1
Embodied Energy, MJ/kg 110
55
Embodied Water, L/kg 480
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
48 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 410
510 to 4780
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
24 to 86
Strength to Weight: Bending, points 26
22 to 51
Thermal Shock Resistance, points 25
23 to 84

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.5
Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.030
Chromium (Cr), % 23.5 to 27.5
11 to 13
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 1.0 to 5.0
65 to 76
Manganese (Mn), % 0.1 to 1.5
0 to 1.0
Molybdenum (Mo), % 4.0 to 6.0
3.0 to 5.0
Nickel (Ni), % 7.0 to 11
8.0 to 10
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0
0.5 to 1.2
Tungsten (W), % 1.0 to 3.0
0