MakeItFrom.com
Menu (ESC)

7129 Aluminum vs. 7108 Aluminum

Both 7129 Aluminum and 7108 aluminum are aluminum alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is 7108 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 9.0 to 9.1
11
Fatigue Strength, MPa 150 to 190
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 250 to 260
210
Tensile Strength: Ultimate (UTS), MPa 430
350
Tensile Strength: Yield (Proof), MPa 380 to 390
290

Thermal Properties

Latent Heat of Fusion, J/g 380
380
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 630
630
Melting Onset (Solidus), °C 510
530
Specific Heat Capacity, J/kg-K 880
880
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
39
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.9
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
38
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
620
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
47
Strength to Weight: Axial, points 41
34
Strength to Weight: Bending, points 43 to 44
38
Thermal Diffusivity, mm2/s 58
59
Thermal Shock Resistance, points 19
16

Alloy Composition

Aluminum (Al), % 91 to 94
92.4 to 94.7
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
0 to 0.050
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.1
Magnesium (Mg), % 1.3 to 2.0
0.7 to 1.4
Manganese (Mn), % 0 to 0.1
0 to 0.050
Silicon (Si), % 0 to 0.15
0 to 0.1
Titanium (Ti), % 0 to 0.050
0 to 0.050
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
4.5 to 5.5
Zirconium (Zr), % 0
0.12 to 0.25
Residuals, % 0
0 to 0.15