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Grade 32 Titanium vs. Grade 38 Titanium

Both grade 32 titanium and grade 38 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 32 titanium and the bottom bar is grade 38 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 310
330
Melting Completion (Liquidus), °C 1610
1620
Melting Onset (Solidus), °C 1560
1570
Specific Heat Capacity, J/kg-K 550
550
Thermal Conductivity, W/m-K 7.5
8.0
Thermal Expansion, µm/m-K 8.2
9.3

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 38
36
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 32
35
Embodied Energy, MJ/kg 530
560
Embodied Water, L/kg 180
160

Common Calculations

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

Alloy Composition

Aluminum (Al), % 4.5 to 5.5
3.5 to 4.5
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.25
1.2 to 1.8
Molybdenum (Mo), % 0.6 to 1.2
0
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0 to 0.11
0.2 to 0.3
Silicon (Si), % 0.060 to 0.14
0
Tin (Sn), % 0.6 to 1.4
0
Titanium (Ti), % 88.1 to 93
89.9 to 93.1
Vanadium (V), % 0.6 to 1.4
2.0 to 3.0
Zirconium (Zr), % 0.6 to 1.4
0
Residuals, % 0 to 0.4
0 to 0.4