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7475 Aluminum vs. AS41B Magnesium

7475 aluminum belongs to the aluminum alloys classification, while AS41B magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7475 aluminum and the bottom bar is AS41B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 10 to 12
6.0
Fatigue Strength, MPa 190 to 210
97
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 320 to 350
120
Tensile Strength: Ultimate (UTS), MPa 530 to 590
210
Tensile Strength: Yield (Proof), MPa 440 to 520
140

Thermal Properties

Latent Heat of Fusion, J/g 380
370
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 640
620
Melting Onset (Solidus), °C 480
570
Specific Heat Capacity, J/kg-K 870
1000
Thermal Conductivity, W/m-K 140 to 160
68
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33 to 42
17
Electrical Conductivity: Equal Weight (Specific), % IACS 98 to 120
92

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.0
1.7
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53 to 68
11
Resilience: Unit (Modulus of Resilience), kJ/m3 1390 to 1920
220
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
72
Strength to Weight: Axial, points 49 to 55
35
Strength to Weight: Bending, points 48 to 52
47
Thermal Diffusivity, mm2/s 53 to 63
41
Thermal Shock Resistance, points 23 to 26
13

Alloy Composition

Aluminum (Al), % 88.6 to 91.6
3.5 to 5.0
Chromium (Cr), % 0.18 to 0.25
0
Copper (Cu), % 1.2 to 1.9
0 to 0.020
Iron (Fe), % 0 to 0.12
0 to 0.0035
Magnesium (Mg), % 1.9 to 2.6
92.7 to 95.7
Manganese (Mn), % 0 to 0.060
0.35 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0 to 0.1
0.5 to 1.5
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.1 to 6.2
0 to 0.12
Residuals, % 0 to 0.15
0