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Grade 38 Titanium vs. Titanium 6-5-0.5

Both grade 38 titanium and titanium 6-5-0.5 are titanium alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is titanium 6-5-0.5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 11
6.7
Fatigue Strength, MPa 530
530
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
23
Shear Modulus, GPa 40
40
Shear Strength, MPa 600
630
Tensile Strength: Ultimate (UTS), MPa 1000
1080
Tensile Strength: Yield (Proof), MPa 910
990

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
300
Melting Completion (Liquidus), °C 1620
1610
Melting Onset (Solidus), °C 1570
1560
Specific Heat Capacity, J/kg-K 550
550
Thermal Conductivity, W/m-K 8.0
4.2
Thermal Expansion, µm/m-K 9.3
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
41
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 35
33
Embodied Energy, MJ/kg 560
540
Embodied Water, L/kg 160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
71
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
4630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 62
67
Strength to Weight: Bending, points 49
52
Thermal Diffusivity, mm2/s 3.2
1.7
Thermal Shock Resistance, points 72
79

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
5.7 to 6.3
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0 to 0.2
Molybdenum (Mo), % 0
0.25 to 0.75
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0.2 to 0.3
0 to 0.19
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 89.9 to 93.1
85.6 to 90.1
Vanadium (V), % 2.0 to 3.0
0
Zirconium (Zr), % 0
4.0 to 6.0
Residuals, % 0 to 0.4
0 to 0.4