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R30001 Cobalt vs. R31538 Cobalt

Both R30001 cobalt and R31538 cobalt are cobalt alloys. They have 81% of their average alloy composition in common. There are 24 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 R30001 cobalt and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 1.0
13 to 23
Poisson's Ratio 0.28
0.29
Rockwell C Hardness 55
25 to 35
Shear Modulus, GPa 86
86
Tensile Strength: Ultimate (UTS), MPa 620
1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1530
1360
Melting Onset (Solidus), °C 1260
1290
Specific Heat Capacity, J/kg-K 430
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.1

Otherwise Unclassified Properties

Density, g/cm3 9.0
8.4
Embodied Carbon, kg CO2/kg material 8.9
8.1
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 460
530

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 19
34 to 45
Strength to Weight: Bending, points 18
27 to 32
Thermal Diffusivity, mm2/s 3.7
3.5
Thermal Shock Resistance, points 19
25 to 33

Alloy Composition

Carbon (C), % 2.0 to 3.0
0.15 to 0.35
Chromium (Cr), % 28 to 32
26 to 30
Cobalt (Co), % 43 to 59
58.7 to 68.9
Iron (Fe), % 0 to 3.0
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
5.0 to 7.0
Nickel (Ni), % 0 to 3.0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 2.0
0 to 1.0
Tungsten (W), % 11 to 13
0