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R31233 Cobalt vs. ASTM F15 Fe-Ni-Co

R31233 cobalt belongs to the cobalt alloys classification, while ASTM F15 Fe-Ni-Co belongs to the iron alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is ASTM F15 Fe-Ni-Co.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1020
520 to 880

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1350
1410
Melting Onset (Solidus), °C 1330
1450
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
17
Thermal Expansion, µm/m-K 13
6.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
4.0

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.3
Embodied Carbon, kg CO2/kg material 8.4
5.2
Embodied Energy, MJ/kg 110
71
Embodied Water, L/kg 480
190

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 33
17 to 29
Strength to Weight: Bending, points 26
17 to 24
Thermal Diffusivity, mm2/s 3.2
4.5
Thermal Shock Resistance, points 25
32 to 55

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.040
Chromium (Cr), % 23.5 to 27.5
0 to 0.2
Cobalt (Co), % 44.7 to 63.3
16 to 18
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 1.0 to 5.0
50.3 to 56
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0.1 to 1.5
0 to 0.5
Molybdenum (Mo), % 4.0 to 6.0
0 to 0.2
Nickel (Ni), % 7.0 to 11
28 to 30
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.050 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 1.0 to 3.0
0
Zirconium (Zr), % 0
0 to 0.1