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AISI 201L Stainless Steel vs. R30016 Cobalt

AISI 201L stainless steel belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. They have a modest 22% 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 (11, in this case) are not shown.

For each property being compared, the top bar is AISI 201L stainless steel and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 22 to 46
8.4
Fatigue Strength, MPa 270 to 530
290
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
85
Tensile Strength: Ultimate (UTS), MPa 740 to 1040
1010
Tensile Strength: Yield (Proof), MPa 290 to 790
580

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1370
1270
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.5
Embodied Carbon, kg CO2/kg material 2.6
7.7
Embodied Energy, MJ/kg 38
110
Embodied Water, L/kg 140
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210 to 300
72
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1570
770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 37
33
Strength to Weight: Bending, points 24 to 30
26
Thermal Diffusivity, mm2/s 4.0
3.9
Thermal Shock Resistance, points 16 to 23
24

Alloy Composition

Carbon (C), % 0 to 0.030
0.9 to 1.4
Chromium (Cr), % 16 to 18
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Iron (Fe), % 67.9 to 75
0 to 3.0
Manganese (Mn), % 5.5 to 7.5
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 3.5 to 5.5
0 to 3.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0.2 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
3.5 to 5.5