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R30016 Cobalt vs. R31539 Cobalt

Both R30016 cobalt and R31539 cobalt are cobalt alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 8.4
13 to 22
Fatigue Strength, MPa 290
310 to 480
Poisson's Ratio 0.28
0.29
Reduction in Area, % 8.0
13 to 23
Rockwell C Hardness 37
25 to 35
Shear Modulus, GPa 85
86
Tensile Strength: Ultimate (UTS), MPa 1010
1000 to 1340
Tensile Strength: Yield (Proof), MPa 580
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1360
Melting Onset (Solidus), °C 1270
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 7.7
8.2
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 500
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 770
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
33 to 44
Strength to Weight: Bending, points 26
27 to 32
Thermal Diffusivity, mm2/s 3.9
3.5
Thermal Shock Resistance, points 24
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0.9 to 1.4
0 to 0.14
Chromium (Cr), % 28 to 32
26 to 30
Cobalt (Co), % 49.6 to 66.9
57.7 to 68.7
Iron (Fe), % 0 to 3.0
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0.5 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 1.5
5.0 to 7.0
Nickel (Ni), % 0 to 3.0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0.2 to 2.0
0 to 1.0
Tungsten (W), % 3.5 to 5.5
0