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7178 Aluminum vs. Type 2 Magnetic Alloy

7178 aluminum belongs to the aluminum alloys classification, while Type 2 magnetic alloy belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7178 aluminum and the bottom bar is Type 2 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.5 to 12
2.0 to 38
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 240 to 640
510 to 910
Tensile Strength: Yield (Proof), MPa 120 to 560
260 to 870

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Melting Completion (Liquidus), °C 630
1420
Melting Onset (Solidus), °C 480
1370
Specific Heat Capacity, J/kg-K 860
460
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
3.9
Electrical Conductivity: Equal Weight (Specific), % IACS 91
4.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
33
Density, g/cm3 3.1
8.4
Embodied Carbon, kg CO2/kg material 8.2
5.9
Embodied Energy, MJ/kg 150
81
Embodied Water, L/kg 1110
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
18 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
170 to 2010
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 21 to 58
17 to 30
Strength to Weight: Bending, points 28 to 54
17 to 25
Thermal Shock Resistance, points 10 to 28
16 to 29

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0.18 to 0.28
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 1.6 to 2.4
0 to 0.3
Iron (Fe), % 0 to 0.5
48.2 to 53
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.8
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
47 to 49
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0

Comparable Variants