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Grade 20 Titanium vs. R30006 Cobalt

Grade 20 titanium belongs to the titanium alloys classification, while R30006 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 5.7 to 17
1.0
Fatigue Strength, MPa 550 to 630
260
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 47
85
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
900
Tensile Strength: Yield (Proof), MPa 850 to 1190
540

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 1660
1400
Melting Onset (Solidus), °C 1600
1290
Specific Heat Capacity, J/kg-K 520
450
Thermal Expansion, µm/m-K 9.6
11

Otherwise Unclassified Properties

Density, g/cm3 5.0
8.6
Embodied Carbon, kg CO2/kg material 52
7.8
Embodied Energy, MJ/kg 860
110
Embodied Water, L/kg 350
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
23
Strength to Weight: Axial, points 50 to 70
29
Strength to Weight: Bending, points 41 to 52
24
Thermal Shock Resistance, points 55 to 77
26

Alloy Composition


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Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0.9 to 1.4
Chromium (Cr), % 5.5 to 6.5
27 to 32
Cobalt (Co), % 0
48.6 to 68.1
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Molybdenum (Mo), % 3.5 to 4.5
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 2.0
Titanium (Ti), % 71 to 77
0
Tungsten (W), % 0
4.0 to 6.0
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0