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Grade 38 Titanium vs. R30012 Cobalt

Grade 38 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 38 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
1.0
Fatigue Strength, MPa 530
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
86
Tensile Strength: Ultimate (UTS), MPa 1000
830
Tensile Strength: Yield (Proof), MPa 910
650

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 1620
1470
Melting Onset (Solidus), °C 1570
1280
Specific Heat Capacity, J/kg-K 550
440
Thermal Conductivity, W/m-K 8.0
15
Thermal Expansion, µm/m-K 9.3
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.8

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.8
Embodied Carbon, kg CO2/kg material 35
8.3
Embodied Energy, MJ/kg 560
120
Embodied Water, L/kg 160
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 62
26
Strength to Weight: Bending, points 49
22
Thermal Diffusivity, mm2/s 3.2
3.8
Thermal Shock Resistance, points 72
23

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
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), % 1.2 to 1.8
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), % 0.2 to 0.3
0
Silicon (Si), % 0
0 to 2.0
Titanium (Ti), % 89.9 to 93.1
0
Tungsten (W), % 0
7.5 to 9.5
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0