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Grade 9 Titanium vs. R30012 Cobalt

Grade 9 titanium belongs to the titanium alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 9 titanium and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 11 to 17
1.0
Fatigue Strength, MPa 330 to 480
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
86
Tensile Strength: Ultimate (UTS), MPa 700 to 960
830
Tensile Strength: Yield (Proof), MPa 540 to 830
650

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 1640
1470
Melting Onset (Solidus), °C 1590
1280
Specific Heat Capacity, J/kg-K 550
440
Thermal Conductivity, W/m-K 8.1
15
Thermal Expansion, µm/m-K 9.1
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.8

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.8
Embodied Carbon, kg CO2/kg material 36
8.3
Embodied Energy, MJ/kg 580
120
Embodied Water, L/kg 150
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3220
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 43 to 60
26
Strength to Weight: Bending, points 39 to 48
22
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 52 to 71
23

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.15
0
Silicon (Si), % 0
0 to 2.0
Titanium (Ti), % 92.6 to 95.5
0
Tungsten (W), % 0
7.5 to 9.5
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0