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7178 Aluminum vs. Grade Ti-Pd8A Titanium

7178 aluminum belongs to the aluminum alloys classification, while grade Ti-Pd8A titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is 7178 aluminum and the bottom bar is grade Ti-Pd8A titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.5 to 12
13
Fatigue Strength, MPa 120 to 210
260
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 27
40
Tensile Strength: Ultimate (UTS), MPa 240 to 640
500
Tensile Strength: Yield (Proof), MPa 120 to 560
430

Thermal Properties

Latent Heat of Fusion, J/g 370
420
Maximum Temperature: Mechanical, °C 180
320
Melting Completion (Liquidus), °C 630
1660
Melting Onset (Solidus), °C 480
1610
Specific Heat Capacity, J/kg-K 860
540
Thermal Conductivity, W/m-K 130
21
Thermal Expansion, µm/m-K 23
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 91
6.9

Otherwise Unclassified Properties

Density, g/cm3 3.1
4.5
Embodied Carbon, kg CO2/kg material 8.2
49
Embodied Energy, MJ/kg 150
840
Embodied Water, L/kg 1110
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
65
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
35
Strength to Weight: Axial, points 21 to 58
31
Strength to Weight: Bending, points 28 to 54
31
Thermal Diffusivity, mm2/s 47
8.6
Thermal Shock Resistance, points 10 to 28
39

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.5
0 to 0.25
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Palladium (Pd), % 0
0.12 to 0.3
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.2
98.8 to 99.9
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0
0 to 0.4