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R31539 Cobalt vs. SAE-AISI 1019 Steel

R31539 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1019 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is SAE-AISI 1019 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
17 to 29
Fatigue Strength, MPa 310 to 480
190 to 290
Poisson's Ratio 0.29
0.29
Reduction in Area, % 13 to 23
46 to 56
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
470 to 520
Tensile Strength: Yield (Proof), MPa 590 to 940
250 to 430

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.2
1.4
Embodied Energy, MJ/kg 110
18
Embodied Water, L/kg 530
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
82 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
160 to 500
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
17 to 18
Strength to Weight: Bending, points 27 to 32
17 to 18
Thermal Diffusivity, mm2/s 3.5
14
Thermal Shock Resistance, points 24 to 32
15 to 16

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0.15 to 0.2
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
98.7 to 99.15
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.7 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0
0 to 0.050

Comparable Variants