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Grade 7 Titanium vs. R31233 Cobalt

Grade 7 titanium belongs to the titanium alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 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 grade 7 titanium and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 24
17
Fatigue Strength, MPa 250
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 38
85
Tensile Strength: Ultimate (UTS), MPa 420
1020
Tensile Strength: Yield (Proof), MPa 340
420

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Melting Completion (Liquidus), °C 1660
1350
Melting Onset (Solidus), °C 1610
1330
Specific Heat Capacity, J/kg-K 540
440
Thermal Conductivity, W/m-K 22
12
Thermal Expansion, µm/m-K 9.2
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.6
Embodied Carbon, kg CO2/kg material 47
8.4
Embodied Energy, MJ/kg 800
110
Embodied Water, L/kg 470
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
140
Resilience: Unit (Modulus of Resilience), kJ/m3 560
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 28
26
Thermal Diffusivity, mm2/s 8.9
3.2
Thermal Shock Resistance, points 31
25

Alloy Composition


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Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.080
0.020 to 0.1
Chromium (Cr), % 0
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
1.0 to 5.0
Manganese (Mn), % 0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 0
7.0 to 11
Nitrogen (N), % 0 to 0.030
0.030 to 0.12
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.050 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98.7 to 99.88
0
Tungsten (W), % 0
1.0 to 3.0
Residuals, % 0 to 0.4
0