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Grade 38 Titanium vs. Titanium 6-6-2

Both grade 38 titanium and titanium 6-6-2 are titanium alloys. They have a moderately high 90% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is titanium 6-6-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 11
6.7 to 9.0
Fatigue Strength, MPa 530
590 to 670
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
17 to 23
Shear Modulus, GPa 40
44
Shear Strength, MPa 600
670 to 800
Tensile Strength: Ultimate (UTS), MPa 1000
1140 to 1370
Tensile Strength: Yield (Proof), MPa 910
1040 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 410
400
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
540
Thermal Conductivity, W/m-K 8.0
5.5
Thermal Expansion, µm/m-K 9.3
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
1.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
40
Density, g/cm3 4.5
4.8
Embodied Carbon, kg CO2/kg material 35
29
Embodied Energy, MJ/kg 560
470
Embodied Water, L/kg 160
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
89 to 99
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
34
Strength to Weight: Axial, points 62
66 to 79
Strength to Weight: Bending, points 49
50 to 57
Thermal Diffusivity, mm2/s 3.2
2.1
Thermal Shock Resistance, points 72
75 to 90

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
5.0 to 6.0
Carbon (C), % 0 to 0.080
0 to 0.050
Copper (Cu), % 0
0.35 to 1.0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0.35 to 1.0
Molybdenum (Mo), % 0
5.0 to 6.0
Nitrogen (N), % 0 to 0.030
0 to 0.040
Oxygen (O), % 0.2 to 0.3
0 to 0.2
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 89.9 to 93.1
82.8 to 87.8
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0 to 0.4