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R31537 Cobalt vs. S24000 Stainless Steel

R31537 cobalt belongs to the cobalt alloys classification, while S24000 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R31537 cobalt and the bottom bar is S24000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 14 to 23
39
Fatigue Strength, MPa 310 to 480
370
Poisson's Ratio 0.29
0.28
Reduction in Area, % 13 to 23
57
Shear Modulus, GPa 87
77
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
770
Tensile Strength: Yield (Proof), MPa 590 to 940
430

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1390
Melting Onset (Solidus), °C 1290
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.6
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 110
39
Embodied Water, L/kg 530
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
260
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
470
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
28
Strength to Weight: Bending, points 26 to 32
24
Thermal Shock Resistance, points 24 to 32
16

Alloy Composition

Carbon (C), % 0 to 0.14
0 to 0.080
Chromium (Cr), % 26 to 30
17 to 19
Cobalt (Co), % 58.9 to 69
0
Iron (Fe), % 0 to 0.75
61.5 to 69
Manganese (Mn), % 0 to 1.0
11.5 to 14.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
2.3 to 3.7
Nitrogen (N), % 0 to 0.25
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0
0 to 0.030