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Titanium 6-2-4-2 vs. R30816 Cobalt

Titanium 6-2-4-2 belongs to the titanium alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 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 titanium 6-2-4-2 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 8.6
23
Fatigue Strength, MPa 490
250
Poisson's Ratio 0.32
0.3
Reduction in Area, % 21
22
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 950
1020
Tensile Strength: Yield (Proof), MPa 880
460

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Melting Completion (Liquidus), °C 1590
1540
Melting Onset (Solidus), °C 1540
1460
Specific Heat Capacity, J/kg-K 540
420
Thermal Conductivity, W/m-K 6.9
13
Thermal Expansion, µm/m-K 9.5
12

Otherwise Unclassified Properties

Density, g/cm3 4.6
9.1
Embodied Carbon, kg CO2/kg material 32
20
Embodied Energy, MJ/kg 520
320
Embodied Water, L/kg 210
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
190
Resilience: Unit (Modulus of Resilience), kJ/m3 3640
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
22
Strength to Weight: Axial, points 57
31
Strength to Weight: Bending, points 46
25
Thermal Diffusivity, mm2/s 2.8
3.3
Thermal Shock Resistance, points 67
28

Alloy Composition


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Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0 to 0.050
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 1.8 to 2.2
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.060 to 0.12
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tin (Sn), % 1.8 to 2.2
0
Titanium (Ti), % 83.7 to 87.2
0
Tungsten (W), % 0
3.5 to 4.5
Zirconium (Zr), % 3.6 to 4.4
0
Residuals, % 0 to 0.4
0