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R31539 Cobalt vs. R30003 Cobalt

Both R31539 cobalt and R30003 cobalt are cobalt alloys. They have 68% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 13 to 22
10 to 73
Fatigue Strength, MPa 310 to 480
320 to 560
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
83
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
970 to 1720
Tensile Strength: Yield (Proof), MPa 590 to 940
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1360
1400
Melting Onset (Solidus), °C 1290
1440
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 8.2
8.0
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 530
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
600 to 2790
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
32 to 57
Strength to Weight: Bending, points 27 to 32
26 to 38
Thermal Diffusivity, mm2/s 3.5
3.3
Thermal Shock Resistance, points 24 to 32
26 to 45

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.14
0 to 0.15
Chromium (Cr), % 26 to 30
19 to 21
Cobalt (Co), % 57.7 to 68.7
39 to 41
Iron (Fe), % 0 to 0.75
10 to 20.5
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
1.5 to 2.5
Molybdenum (Mo), % 5.0 to 7.0
6.0 to 8.0
Nickel (Ni), % 0 to 1.0
14 to 16
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0
0 to 0.015

Comparable Variants