MakeItFrom.com
Menu (ESC)

2124 Aluminum vs. 7178 Aluminum

Both 2124 aluminum and 7178 aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is 2124 aluminum and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
71
Elongation at Break, % 5.7
4.5 to 12
Fatigue Strength, MPa 130
120 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
27
Shear Strength, MPa 280
140 to 380
Tensile Strength: Ultimate (UTS), MPa 490
240 to 640
Tensile Strength: Yield (Proof), MPa 430
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 390
370
Maximum Temperature: Mechanical, °C 190
180
Melting Completion (Liquidus), °C 640
630
Melting Onset (Solidus), °C 500
480
Specific Heat Capacity, J/kg-K 880
860
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
31
Electrical Conductivity: Equal Weight (Specific), % IACS 110
91

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 3.0
3.1
Embodied Carbon, kg CO2/kg material 8.2
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
110 to 2220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 45
21 to 58
Strength to Weight: Bending, points 46
28 to 54
Thermal Diffusivity, mm2/s 58
47
Thermal Shock Resistance, points 21
10 to 28

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
85.4 to 89.5
Chromium (Cr), % 0 to 0.1
0.18 to 0.28
Copper (Cu), % 3.8 to 4.9
1.6 to 2.4
Iron (Fe), % 0 to 0.3
0 to 0.5
Magnesium (Mg), % 1.2 to 1.8
2.4 to 3.1
Manganese (Mn), % 0.3 to 0.9
0 to 0.3
Silicon (Si), % 0 to 0.2
0 to 0.4
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0 to 0.25
6.3 to 7.3
Residuals, % 0
0 to 0.15