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R31539 Cobalt vs. Ductile Cast Iron

R31539 cobalt belongs to the cobalt alloys classification, while ductile cast iron belongs to the iron alloys. There are 26 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 ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
170 to 180
Elongation at Break, % 13 to 22
2.1 to 20
Poisson's Ratio 0.29
0.28 to 0.31
Shear Modulus, GPa 86
64 to 70
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
460 to 920
Tensile Strength: Yield (Proof), MPa 590 to 940
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1160
Melting Onset (Solidus), °C 1290
1120
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 13
31 to 36
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.8 to 9.4

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 8.2
1.5
Embodied Energy, MJ/kg 110
21
Embodied Water, L/kg 530
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
280 to 1330
Stiffness to Weight: Axial, points 15
12 to 14
Stiffness to Weight: Bending, points 24
24 to 26
Strength to Weight: Axial, points 33 to 44
17 to 35
Strength to Weight: Bending, points 27 to 32
18 to 29
Thermal Diffusivity, mm2/s 3.5
8.9 to 10
Thermal Shock Resistance, points 24 to 32
17 to 35

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
3.0 to 3.5
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
93.7 to 95.5
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
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 0.080
Silicon (Si), % 0 to 1.0
1.5 to 2.8

Comparable Variants