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Annealed AISI 201LN vs. Annealed R31538 Cobalt

Annealed AISI 201LN belongs to the iron alloys classification, while annealed R31538 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is annealed AISI 201LN and the bottom bar is annealed R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 51
23
Fatigue Strength, MPa 340
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 740
1020
Tensile Strength: Yield (Proof), MPa 350
580

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1370
1290
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.4
Embodied Carbon, kg CO2/kg material 2.6
8.1
Embodied Energy, MJ/kg 38
110
Embodied Water, L/kg 140
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
200
Resilience: Unit (Modulus of Resilience), kJ/m3 310
750
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
34
Strength to Weight: Bending, points 24
27
Thermal Diffusivity, mm2/s 4.0
3.5
Thermal Shock Resistance, points 16
25

Alloy Composition

Carbon (C), % 0 to 0.030
0.15 to 0.35
Chromium (Cr), % 16 to 17.5
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
0 to 0.75
Manganese (Mn), % 6.4 to 7.5
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 4.0 to 5.0
0 to 1.0
Nitrogen (N), % 0.1 to 0.25
0 to 0.25
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0