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7475 Aluminum vs. ISO-WD32250 Magnesium

7475 aluminum belongs to the aluminum alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7475 aluminum and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 10 to 12
4.5 to 8.6
Fatigue Strength, MPa 190 to 210
170 to 210
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 320 to 350
180 to 190
Tensile Strength: Ultimate (UTS), MPa 530 to 590
310 to 330
Tensile Strength: Yield (Proof), MPa 440 to 520
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 480
550
Specific Heat Capacity, J/kg-K 870
980
Thermal Conductivity, W/m-K 140 to 160
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33 to 42
25
Electrical Conductivity: Equal Weight (Specific), % IACS 98 to 120
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
1.8
Embodied Carbon, kg CO2/kg material 8.2
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53 to 68
14 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 1390 to 1920
630 to 930
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
67
Strength to Weight: Axial, points 49 to 55
49 to 51
Strength to Weight: Bending, points 48 to 52
58 to 60
Thermal Diffusivity, mm2/s 53 to 63
72
Thermal Shock Resistance, points 23 to 26
19 to 20

Alloy Composition

Aluminum (Al), % 88.6 to 91.6
0
Chromium (Cr), % 0.18 to 0.25
0
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.12
0
Magnesium (Mg), % 1.9 to 2.6
94.9 to 97.1
Manganese (Mn), % 0 to 0.060
0
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.1 to 6.2
2.5 to 4.0
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3