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Titanium 6-5-0.5 vs. Grade 37 Titanium

Both titanium 6-5-0.5 and grade 37 titanium are titanium alloys. Both are furnished in the annealed condition. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is titanium 6-5-0.5 and the bottom bar is grade 37 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 6.7
22
Fatigue Strength, MPa 530
170
Poisson's Ratio 0.32
0.32
Reduction in Area, % 23
34
Shear Modulus, GPa 40
40
Shear Strength, MPa 630
240
Tensile Strength: Ultimate (UTS), MPa 1080
390
Tensile Strength: Yield (Proof), MPa 990
250

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 300
310
Melting Completion (Liquidus), °C 1610
1650
Melting Onset (Solidus), °C 1560
1600
Specific Heat Capacity, J/kg-K 550
550
Thermal Conductivity, W/m-K 4.2
21
Thermal Expansion, µm/m-K 9.4
8.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
6.8

Otherwise Unclassified Properties

Base Metal Price, % relative 41
36
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 33
31
Embodied Energy, MJ/kg 540
500
Embodied Water, L/kg 180
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71
76
Resilience: Unit (Modulus of Resilience), kJ/m3 4630
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 67
24
Strength to Weight: Bending, points 52
26
Thermal Diffusivity, mm2/s 1.7
8.4
Thermal Shock Resistance, points 79
29

Alloy Composition


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Aluminum (Al), % 5.7 to 6.3
1.0 to 2.0
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.2
0 to 0.3
Molybdenum (Mo), % 0.25 to 0.75
0
Nitrogen (N), % 0 to 0.050
0 to 0.030
Oxygen (O), % 0 to 0.19
0 to 0.25
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 85.6 to 90.1
96.9 to 99
Zirconium (Zr), % 4.0 to 6.0
0
Residuals, % 0 to 0.4
0 to 0.4