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Grade 7 Titanium vs. Grade 35 Titanium

Both grade 7 titanium and grade 35 titanium are titanium alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 7 titanium and the bottom bar is grade 35 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 24
5.6
Fatigue Strength, MPa 250
330
Poisson's Ratio 0.32
0.32
Reduction in Area, % 34
23
Shear Modulus, GPa 38
41
Shear Strength, MPa 270
580
Tensile Strength: Ultimate (UTS), MPa 420
1000
Tensile Strength: Yield (Proof), MPa 340
630

Thermal Properties

Latent Heat of Fusion, J/g 420
420
Maximum Temperature: Mechanical, °C 320
320
Melting Completion (Liquidus), °C 1660
1630
Melting Onset (Solidus), °C 1610
1580
Specific Heat Capacity, J/kg-K 540
550
Thermal Conductivity, W/m-K 22
7.4
Thermal Expansion, µm/m-K 9.2
9.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.1
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
2.2

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.6
Embodied Carbon, kg CO2/kg material 47
33
Embodied Energy, MJ/kg 800
530
Embodied Water, L/kg 470
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
49
Resilience: Unit (Modulus of Resilience), kJ/m3 560
1830
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 26
61
Strength to Weight: Bending, points 28
49
Thermal Diffusivity, mm2/s 8.9
3.0
Thermal Shock Resistance, points 31
70

Alloy Composition


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Aluminum (Al), % 0
4.0 to 5.0
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.3
0.2 to 0.8
Molybdenum (Mo), % 0
1.5 to 2.5
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0 to 0.25
0 to 0.25
Palladium (Pd), % 0.12 to 0.25
0
Silicon (Si), % 0
0.2 to 0.4
Titanium (Ti), % 98.7 to 99.88
88.4 to 93
Vanadium (V), % 0
1.1 to 2.1
Residuals, % 0 to 0.4
0 to 0.4