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R31539 Cobalt vs. Titanium 6-7

R31539 cobalt belongs to the cobalt alloys classification, while titanium 6-7 belongs to the titanium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Elongation at Break, % 13 to 22
11
Fatigue Strength, MPa 310 to 480
530
Poisson's Ratio 0.29
0.33
Reduction in Area, % 13 to 23
29
Shear Modulus, GPa 86
45
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
1020
Tensile Strength: Yield (Proof), MPa 590 to 940
900

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1360
1700
Melting Onset (Solidus), °C 1290
1650
Specific Heat Capacity, J/kg-K 450
520
Thermal Expansion, µm/m-K 13
9.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
5.1
Embodied Carbon, kg CO2/kg material 8.2
34
Embodied Energy, MJ/kg 110
540
Embodied Water, L/kg 530
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
3460
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 33 to 44
56
Strength to Weight: Bending, points 27 to 32
44
Thermal Shock Resistance, points 24 to 32
66

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
5.5 to 6.5
Carbon (C), % 0 to 0.14
0 to 0.080
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 0 to 0.75
0 to 0.25
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
6.5 to 7.5
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0 to 0.25
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 1.0
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
84.9 to 88