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Grade 38 Titanium vs. Grade 32 Titanium

Both grade 38 titanium and grade 32 titanium are titanium alloys. Both are furnished in the annealed condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is grade 32 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11
11
Fatigue Strength, MPa 530
390
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
28
Shear Modulus, GPa 40
40
Shear Strength, MPa 600
460
Tensile Strength: Ultimate (UTS), MPa 1000
770
Tensile Strength: Yield (Proof), MPa 910
670

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
310
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
7.5
Thermal Expansion, µm/m-K 9.3
8.2

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
38
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 35
32
Embodied Energy, MJ/kg 560
530
Embodied Water, L/kg 160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
83
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
2100
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 62
47
Strength to Weight: Bending, points 49
41
Thermal Diffusivity, mm2/s 3.2
3.0
Thermal Shock Resistance, points 72
63

Alloy Composition


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Aluminum (Al), % 3.5 to 4.5
4.5 to 5.5
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 0.25
Molybdenum (Mo), % 0
0.6 to 1.2
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0.2 to 0.3
0 to 0.11
Silicon (Si), % 0
0.060 to 0.14
Tin (Sn), % 0
0.6 to 1.4
Titanium (Ti), % 89.9 to 93.1
88.1 to 93
Vanadium (V), % 2.0 to 3.0
0.6 to 1.4
Zirconium (Zr), % 0
0.6 to 1.4
Residuals, % 0 to 0.4
0 to 0.4