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Grade 32 Titanium vs. Grade 37 Titanium

Both grade 32 titanium and grade 37 titanium 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 32 titanium and the bottom bar is grade 37 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11
22
Fatigue Strength, MPa 390
170
Poisson's Ratio 0.32
0.32
Reduction in Area, % 28
34
Shear Modulus, GPa 40
40
Shear Strength, MPa 460
240
Tensile Strength: Ultimate (UTS), MPa 770
390
Tensile Strength: Yield (Proof), MPa 670
250

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 310
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 7.5
21
Thermal Expansion, µm/m-K 8.2
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 38
36
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 32
31
Embodied Energy, MJ/kg 530
500
Embodied Water, L/kg 180
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
76
Resilience: Unit (Modulus of Resilience), kJ/m3 2100
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 47
24
Strength to Weight: Bending, points 41
26
Thermal Diffusivity, mm2/s 3.0
8.4
Thermal Shock Resistance, points 63
29

Alloy Composition

Aluminum (Al), % 4.5 to 5.5
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 0.25
0 to 0.3
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 to 0.25
Silicon (Si), % 0.060 to 0.14
0
Tin (Sn), % 0.6 to 1.4
0
Titanium (Ti), % 88.1 to 93
96.9 to 99
Vanadium (V), % 0.6 to 1.4
0
Zirconium (Zr), % 0.6 to 1.4
0
Residuals, % 0 to 0.4
0 to 0.4