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R31539 Cobalt vs. AISI 201LN Stainless Steel

R31539 cobalt belongs to the cobalt alloys classification, while AISI 201LN stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is AISI 201LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 22
25 to 51
Fatigue Strength, MPa 310 to 480
340 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
740 to 1060
Tensile Strength: Yield (Proof), MPa 590 to 940
350 to 770

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 110
38
Embodied Water, L/kg 530
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
230 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
310 to 1520
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
27 to 38
Strength to Weight: Bending, points 27 to 32
24 to 30
Thermal Diffusivity, mm2/s 3.5
4.0
Thermal Shock Resistance, points 24 to 32
16 to 23

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.030
Chromium (Cr), % 26 to 30
16 to 17.5
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 0 to 0.75
67.9 to 73.5
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
6.4 to 7.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
4.0 to 5.0
Nitrogen (N), % 0 to 0.25
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0
0 to 0.015

Comparable Variants