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Grade 28 Titanium vs. Titanium 6-7

Both grade 28 titanium and titanium 6-7 are titanium alloys. They have 90% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 28 titanium and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 11 to 17
11
Fatigue Strength, MPa 330 to 480
530
Poisson's Ratio 0.32
0.33
Reduction in Area, % 22
29
Shear Modulus, GPa 40
45
Shear Strength, MPa 420 to 590
610
Tensile Strength: Ultimate (UTS), MPa 690 to 980
1020
Tensile Strength: Yield (Proof), MPa 540 to 810
900

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
300
Melting Completion (Liquidus), °C 1640
1700
Melting Onset (Solidus), °C 1590
1650
Specific Heat Capacity, J/kg-K 550
520
Thermal Expansion, µm/m-K 9.9
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 36
75
Density, g/cm3 4.5
5.1
Embodied Carbon, kg CO2/kg material 37
34
Embodied Energy, MJ/kg 600
540
Embodied Water, L/kg 370
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 3100
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
32
Strength to Weight: Axial, points 43 to 61
56
Strength to Weight: Bending, points 39 to 49
44
Thermal Shock Resistance, points 47 to 66
66

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
5.5 to 6.5
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.0090
Iron (Fe), % 0 to 0.25
0 to 0.25
Molybdenum (Mo), % 0
6.5 to 7.5
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0 to 0.15
0 to 0.2
Ruthenium (Ru), % 0.080 to 0.14
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 92.4 to 95.4
84.9 to 88
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0