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7178 Aluminum vs. Type 4 Magnetic Alloy

7178 aluminum belongs to the aluminum alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 4 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 40
Fatigue Strength, MPa 120 to 210
220 to 400
Poisson's Ratio 0.32
0.31
Shear Modulus, GPa 27
73
Shear Strength, MPa 140 to 380
420 to 630
Tensile Strength: Ultimate (UTS), MPa 240 to 640
620 to 1100
Tensile Strength: Yield (Proof), MPa 120 to 560
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Mechanical, °C 180
900
Melting Completion (Liquidus), °C 630
1420
Melting Onset (Solidus), °C 480
1370
Specific Heat Capacity, J/kg-K 860
440
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 91
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
60
Density, g/cm3 3.1
8.8
Embodied Carbon, kg CO2/kg material 8.2
10
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1110
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
190 to 2840
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 45
22
Strength to Weight: Axial, points 21 to 58
19 to 35
Strength to Weight: Bending, points 28 to 54
18 to 27
Thermal Shock Resistance, points 10 to 28
21 to 37

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
9.5 to 17.5
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.8
Molybdenum (Mo), % 0
3.5 to 6.0
Nickel (Ni), % 0
79 to 82
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0

Comparable Variants