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Grade 17 Titanium vs. R30012 Cobalt

Grade 17 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 (5, in this case) are not shown.

For each property being compared, the top bar is grade 17 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, % 27
1.0
Fatigue Strength, MPa 160
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
86
Tensile Strength: Ultimate (UTS), MPa 270
830
Tensile Strength: Yield (Proof), MPa 210
650

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Melting Completion (Liquidus), °C 1660
1470
Melting Onset (Solidus), °C 1610
1280
Specific Heat Capacity, J/kg-K 540
440
Thermal Conductivity, W/m-K 23
15
Thermal Expansion, µm/m-K 8.7
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
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 600
120
Embodied Water, L/kg 230
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 220
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 17
26
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 9.3
3.8
Thermal Shock Resistance, points 21
23

Alloy Composition

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 0.2
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 0.18
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 2.0
Titanium (Ti), % 99.015 to 99.96
0
Tungsten (W), % 0
7.5 to 9.5
Residuals, % 0 to 0.4
0