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7204 Aluminum vs. 2618A Aluminum

Both 7204 aluminum and 2618A aluminum are aluminum alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is 7204 aluminum and the bottom bar is 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
72
Elongation at Break, % 11 to 13
4.5
Fatigue Strength, MPa 110 to 130
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 130 to 220
260
Tensile Strength: Ultimate (UTS), MPa 220 to 380
440
Tensile Strength: Yield (Proof), MPa 120 to 310
410

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 210
230
Melting Completion (Liquidus), °C 640
670
Melting Onset (Solidus), °C 520
560
Specific Heat Capacity, J/kg-K 880
880
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
37
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
3.0
Embodied Carbon, kg CO2/kg material 8.4
8.4
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
19
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
1180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
47
Strength to Weight: Axial, points 21 to 36
41
Strength to Weight: Bending, points 28 to 40
44
Thermal Diffusivity, mm2/s 58
59
Thermal Shock Resistance, points 9.4 to 16
19

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
91.5 to 95.2
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.2
1.8 to 2.7
Iron (Fe), % 0 to 0.35
0.9 to 1.4
Magnesium (Mg), % 1.0 to 2.0
1.2 to 1.8
Manganese (Mn), % 0.2 to 0.7
0 to 0.25
Nickel (Ni), % 0
0.8 to 1.4
Silicon (Si), % 0 to 0.3
0.15 to 0.25
Titanium (Ti), % 0 to 0.2
0 to 0.2
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 4.0 to 5.0
0 to 0.15
Zirconium (Zr), % 0 to 0.25
0 to 0.25
Residuals, % 0
0 to 0.15