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R31539 Cobalt vs. Grade 12 Titanium

R31539 cobalt belongs to the cobalt alloys classification, while grade 12 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is grade 12 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 13 to 22
21
Fatigue Strength, MPa 310 to 480
280
Poisson's Ratio 0.29
0.32
Reduction in Area, % 13 to 23
28
Shear Modulus, GPa 86
39
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
530
Tensile Strength: Yield (Proof), MPa 590 to 940
410

Thermal Properties

Latent Heat of Fusion, J/g 320
420
Melting Completion (Liquidus), °C 1360
1660
Melting Onset (Solidus), °C 1290
1610
Specific Heat Capacity, J/kg-K 450
540
Thermal Conductivity, W/m-K 13
21
Thermal Expansion, µm/m-K 13
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
6.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
4.5
Embodied Carbon, kg CO2/kg material 8.2
31
Embodied Energy, MJ/kg 110
500
Embodied Water, L/kg 530
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
770
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 33 to 44
32
Strength to Weight: Bending, points 27 to 32
32
Thermal Diffusivity, mm2/s 3.5
8.5
Thermal Shock Resistance, points 24 to 32
37

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
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 0.015
Iron (Fe), % 0 to 0.75
0 to 0.3
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0.2 to 0.4
Nickel (Ni), % 0 to 1.0
0.6 to 0.9
Nitrogen (N), % 0 to 0.25
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Silicon (Si), % 0 to 1.0
0
Titanium (Ti), % 0
97.6 to 99.2
Residuals, % 0
0 to 0.4