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Titanium 6-6-2 vs. Titanium 6-7

Both titanium 6-6-2 and titanium 6-7 are titanium alloys. They have a very high 97% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is titanium 6-6-2 and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
120
Elongation at Break, % 6.7 to 9.0
11
Fatigue Strength, MPa 590 to 670
530
Poisson's Ratio 0.32
0.33
Reduction in Area, % 17 to 23
29
Shear Modulus, GPa 44
45
Shear Strength, MPa 670 to 800
610
Tensile Strength: Ultimate (UTS), MPa 1140 to 1370
1020
Tensile Strength: Yield (Proof), MPa 1040 to 1230
900

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 310
300
Melting Completion (Liquidus), °C 1610
1700
Melting Onset (Solidus), °C 1560
1650
Specific Heat Capacity, J/kg-K 540
520
Thermal Expansion, µm/m-K 9.4
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 40
75
Density, g/cm3 4.8
5.1
Embodied Carbon, kg CO2/kg material 29
34
Embodied Energy, MJ/kg 470
540
Embodied Water, L/kg 200
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 99
110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
32
Strength to Weight: Axial, points 66 to 79
56
Strength to Weight: Bending, points 50 to 57
44
Thermal Shock Resistance, points 75 to 90
66

Alloy Composition

Aluminum (Al), % 5.0 to 6.0
5.5 to 6.5
Carbon (C), % 0 to 0.050
0 to 0.080
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0 to 0.0090
Iron (Fe), % 0.35 to 1.0
0 to 0.25
Molybdenum (Mo), % 5.0 to 6.0
6.5 to 7.5
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0 to 0.040
0 to 0.050
Oxygen (O), % 0 to 0.2
0 to 0.2
Tantalum (Ta), % 0
0 to 0.5
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.8 to 87.8
84.9 to 88
Residuals, % 0 to 0.4
0