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Grade 20 Titanium vs. R30012 Cobalt

Grade 20 titanium belongs to the titanium alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is R30012 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
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 47
86
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
830
Tensile Strength: Yield (Proof), MPa 850 to 1190
650

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 1660
1470
Melting Onset (Solidus), °C 1600
1280
Specific Heat Capacity, J/kg-K 520
440
Thermal Expansion, µm/m-K 9.6
12

Otherwise Unclassified Properties

Density, g/cm3 5.0
8.8
Embodied Carbon, kg CO2/kg material 52
8.3
Embodied Energy, MJ/kg 860
120
Embodied Water, L/kg 350
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
23
Strength to Weight: Axial, points 50 to 70
26
Strength to Weight: Bending, points 41 to 52
22
Thermal Shock Resistance, points 55 to 77
23

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
1.4 to 2.0
Chromium (Cr), % 5.5 to 6.5
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
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
7.5 to 9.5
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0