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Grade 18 Titanium vs. Grade 11 Titanium

Both grade 18 titanium and grade 11 titanium are titanium alloys. They have a moderately high 94% 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 18 titanium and the bottom bar is grade 11 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11 to 17
29
Fatigue Strength, MPa 330 to 480
170
Poisson's Ratio 0.32
0.32
Reduction in Area, % 23
37
Shear Modulus, GPa 40
38
Shear Strength, MPa 420 to 590
200
Tensile Strength: Ultimate (UTS), MPa 690 to 980
310
Tensile Strength: Yield (Proof), MPa 540 to 810
230

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 330
320
Melting Completion (Liquidus), °C 1640
1660
Melting Onset (Solidus), °C 1590
1610
Specific Heat Capacity, J/kg-K 550
540
Thermal Conductivity, W/m-K 8.3
22
Thermal Expansion, µm/m-K 9.9
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
7.3

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 41
47
Embodied Energy, MJ/kg 670
800
Embodied Water, L/kg 270
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
81
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3110
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 43 to 61
19
Strength to Weight: Bending, points 39 to 49
22
Thermal Diffusivity, mm2/s 3.4
8.9
Thermal Shock Resistance, points 47 to 67
22

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
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 0.2
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0 to 0.15
0 to 0.18
Palladium (Pd), % 0.040 to 0.080
0.12 to 0.25
Titanium (Ti), % 92.5 to 95.5
98.8 to 99.88
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0 to 0.4