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Grade 34 Titanium vs. R31233 Cobalt

Grade 34 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 34 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, % 20
17
Fatigue Strength, MPa 310
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
85
Tensile Strength: Ultimate (UTS), MPa 510
1020
Tensile Strength: Yield (Proof), MPa 450
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 21
12
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.6
Embodied Carbon, kg CO2/kg material 33
8.4
Embodied Energy, MJ/kg 530
110
Embodied Water, L/kg 200
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
140
Resilience: Unit (Modulus of Resilience), kJ/m3 960
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 31
33
Strength to Weight: Bending, points 31
26
Thermal Diffusivity, mm2/s 8.4
3.2
Thermal Shock Resistance, points 39
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.080
0.020 to 0.1
Chromium (Cr), % 0.1 to 0.2
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), % 0.35 to 0.55
7.0 to 11
Nitrogen (N), % 0 to 0.050
0.030 to 0.12
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.010 to 0.020
0
Phosphorus (P), % 0
0 to 0.030
Ruthenium (Ru), % 0.020 to 0.040
0
Silicon (Si), % 0
0.050 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98 to 99.52
0
Tungsten (W), % 0
1.0 to 3.0
Residuals, % 0 to 0.4
0