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7204 Aluminum vs. ZK51A Magnesium

7204 aluminum belongs to the aluminum alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7204 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 11 to 13
4.7
Fatigue Strength, MPa 110 to 130
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 130 to 220
160
Tensile Strength: Ultimate (UTS), MPa 220 to 380
240
Tensile Strength: Yield (Proof), MPa 120 to 310
150

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 210
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 520
550
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.9
1.8
Embodied Carbon, kg CO2/kg material 8.4
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1140
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
10
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
64
Strength to Weight: Axial, points 21 to 36
36
Strength to Weight: Bending, points 28 to 40
47
Thermal Diffusivity, mm2/s 58
61
Thermal Shock Resistance, points 9.4 to 16
15

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.2
0 to 0.1
Iron (Fe), % 0 to 0.35
0
Magnesium (Mg), % 1.0 to 2.0
93.1 to 95.9
Manganese (Mn), % 0.2 to 0.7
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
0
Titanium (Ti), % 0 to 0.2
0
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 4.0 to 5.0
3.6 to 5.5
Zirconium (Zr), % 0 to 0.25
0.5 to 1.0
Residuals, % 0
0 to 0.3