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Grade 34 Titanium vs. R30012 Cobalt

Grade 34 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 34 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, % 20
1.0
Fatigue Strength, MPa 310
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
86
Tensile Strength: Ultimate (UTS), MPa 510
830
Tensile Strength: Yield (Proof), MPa 450
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 21
15
Thermal Expansion, µm/m-K 8.7
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
1.8

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.8
Embodied Carbon, kg CO2/kg material 33
8.3
Embodied Energy, MJ/kg 530
120
Embodied Water, L/kg 200
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 960
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 31
26
Strength to Weight: Bending, points 31
22
Thermal Diffusivity, mm2/s 8.4
3.8
Thermal Shock Resistance, points 39
23

Alloy Composition

Carbon (C), % 0 to 0.080
1.4 to 2.0
Chromium (Cr), % 0.1 to 0.2
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0.35 to 0.55
0 to 3.0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.010 to 0.020
0
Ruthenium (Ru), % 0.020 to 0.040
0
Silicon (Si), % 0
0 to 2.0
Titanium (Ti), % 98 to 99.52
0
Tungsten (W), % 0
7.5 to 9.5
Residuals, % 0 to 0.4
0