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204.0 Aluminum vs. 7178 Aluminum

Both 204.0 aluminum and 7178 aluminum are aluminum alloys. They have a moderately high 90% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 204.0 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 to 7.8
4.5 to 12
Fatigue Strength, MPa 63 to 77
120 to 210
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
27
Tensile Strength: Ultimate (UTS), MPa 230 to 340
240 to 640
Tensile Strength: Yield (Proof), MPa 180 to 220
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 390
370
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 650
630
Melting Onset (Solidus), °C 580
480
Specific Heat Capacity, J/kg-K 880
860
Thermal Conductivity, W/m-K 120
130
Thermal Expansion, µm/m-K 19
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29 to 34
31
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 100
91

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 3.0
3.1
Embodied Carbon, kg CO2/kg material 8.0
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
110 to 2220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 21 to 31
21 to 58
Strength to Weight: Bending, points 28 to 36
28 to 54
Thermal Diffusivity, mm2/s 46
47
Thermal Shock Resistance, points 12 to 18
10 to 28

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
85.4 to 89.5
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 4.2 to 5.0
1.6 to 2.4
Iron (Fe), % 0 to 0.35
0 to 0.5
Magnesium (Mg), % 0.15 to 0.35
2.4 to 3.1
Manganese (Mn), % 0 to 0.1
0 to 0.3
Nickel (Ni), % 0 to 0.050
0
Silicon (Si), % 0 to 0.2
0 to 0.4
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0 to 0.2
Zinc (Zn), % 0 to 0.1
6.3 to 7.3
Residuals, % 0
0 to 0.15

Comparable Variants