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R31538 Cobalt vs. Monel R-405

R31538 cobalt belongs to the cobalt alloys classification, while Monel R-405 belongs to the nickel alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is Monel R-405.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
160
Elongation at Break, % 13 to 23
9.1 to 39
Fatigue Strength, MPa 310 to 480
210 to 250
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
62
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
540 to 630
Tensile Strength: Yield (Proof), MPa 580 to 930
190 to 350

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1350
Melting Onset (Solidus), °C 1290
1300
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 13
23
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.4

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 8.1
7.9
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 530
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
49 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
120 to 370
Stiffness to Weight: Axial, points 15
10
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 34 to 45
17 to 20
Strength to Weight: Bending, points 27 to 32
17 to 18
Thermal Diffusivity, mm2/s 3.5
5.9
Thermal Shock Resistance, points 25 to 33
17 to 20

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.3
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
28 to 34
Iron (Fe), % 0 to 0.75
0 to 2.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
63 to 72
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0.025 to 0.060

Comparable Variants