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EN AC-21100 Aluminum vs. Grade 9 Titanium

EN AC-21100 aluminum belongs to the aluminum alloys classification, while grade 9 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN AC-21100 aluminum and the bottom bar is grade 9 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 6.2 to 7.3
11 to 17
Fatigue Strength, MPa 79 to 87
330 to 480
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
40
Tensile Strength: Ultimate (UTS), MPa 340 to 350
700 to 960
Tensile Strength: Yield (Proof), MPa 210 to 240
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 390
410
Maximum Temperature: Mechanical, °C 170
330
Melting Completion (Liquidus), °C 670
1640
Melting Onset (Solidus), °C 550
1590
Specific Heat Capacity, J/kg-K 880
550
Thermal Conductivity, W/m-K 130
8.1
Thermal Expansion, µm/m-K 23
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
37
Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 8.0
36
Embodied Energy, MJ/kg 150
580
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
1380 to 3220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 31 to 33
43 to 60
Strength to Weight: Bending, points 36 to 37
39 to 48
Thermal Diffusivity, mm2/s 48
3.3
Thermal Shock Resistance, points 15
52 to 71

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
2.5 to 3.5
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 4.2 to 5.2
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.19
0 to 0.25
Manganese (Mn), % 0 to 0.55
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Silicon (Si), % 0 to 0.18
0
Titanium (Ti), % 0.15 to 0.3
92.6 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0
0 to 0.4