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7129 Aluminum vs. 2219 Aluminum

Both 7129 Aluminum and 2219 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is 2219 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
72
Elongation at Break, % 9.0 to 9.1
2.2 to 20
Fatigue Strength, MPa 150 to 190
90 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 250 to 260
110 to 280
Tensile Strength: Ultimate (UTS), MPa 430
180 to 480
Tensile Strength: Yield (Proof), MPa 380 to 390
88 to 390

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 180
230
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
540
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 150
110 to 170
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
28 to 44
Electrical Conductivity: Equal Weight (Specific), % IACS 120
81 to 130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
3.1
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
9.6 to 60
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
54 to 1060
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
44
Strength to Weight: Axial, points 41
16 to 43
Strength to Weight: Bending, points 43 to 44
23 to 44
Thermal Diffusivity, mm2/s 58
42 to 63
Thermal Shock Resistance, points 19
8.2 to 22

Alloy Composition

Aluminum (Al), % 91 to 94
91.5 to 93.8
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
5.8 to 6.8
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.3
Magnesium (Mg), % 1.3 to 2.0
0 to 0.020
Manganese (Mn), % 0 to 0.1
0.2 to 0.4
Silicon (Si), % 0 to 0.15
0 to 0.2
Titanium (Ti), % 0 to 0.050
0.020 to 0.1
Vanadium (V), % 0 to 0.050
0.050 to 0.15
Zinc (Zn), % 4.2 to 5.2
0 to 0.1
Zirconium (Zr), % 0
0.1 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants