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R30003 Cobalt vs. R31538 Cobalt

Both R30003 cobalt and R31538 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 R30003 cobalt and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 10 to 73
13 to 23
Fatigue Strength, MPa 320 to 560
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
86
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
1020 to 1360
Tensile Strength: Yield (Proof), MPa 510 to 1090
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1400
1360
Melting Onset (Solidus), °C 1440
1290
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 8.0
8.1
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 400
530

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
750 to 1920
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32 to 57
34 to 45
Strength to Weight: Bending, points 26 to 38
27 to 32
Thermal Diffusivity, mm2/s 3.3
3.5
Thermal Shock Resistance, points 26 to 45
25 to 33

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0.15 to 0.35
Chromium (Cr), % 19 to 21
26 to 30
Cobalt (Co), % 39 to 41
58.7 to 68.9
Iron (Fe), % 10 to 20.5
0 to 0.75
Manganese (Mn), % 1.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 6.0 to 8.0
5.0 to 7.0
Nickel (Ni), % 14 to 16
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.015
0

Comparable Variants