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Grade 38 Titanium vs. R30075 Cobalt

Grade 38 titanium belongs to the titanium alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210 to 250
Elongation at Break, % 11
12
Fatigue Strength, MPa 530
250 to 840
Poisson's Ratio 0.32
0.29
Reduction in Area, % 29
20
Shear Modulus, GPa 40
82 to 98
Tensile Strength: Ultimate (UTS), MPa 1000
780 to 1280
Tensile Strength: Yield (Proof), MPa 910
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 1620
1360
Melting Onset (Solidus), °C 1570
1290
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 8.0
13
Thermal Expansion, µm/m-K 9.3
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 35
8.1
Embodied Energy, MJ/kg 560
110
Embodied Water, L/kg 160
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
560 to 1410
Stiffness to Weight: Axial, points 13
14 to 17
Stiffness to Weight: Bending, points 35
24 to 25
Strength to Weight: Axial, points 62
26 to 42
Strength to Weight: Bending, points 49
22 to 31
Thermal Diffusivity, mm2/s 3.2
3.5
Thermal Shock Resistance, points 72
21 to 29

Alloy Composition


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Aluminum (Al), % 3.5 to 4.5
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0 to 0.080
0 to 0.35
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
58.7 to 68
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0 to 0.030
0 to 0.25
Oxygen (O), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 89.9 to 93.1
0 to 0.1
Tungsten (W), % 0
0 to 0.2
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0