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ISO-WD21150 Magnesium vs. 705.0 Aluminum

ISO-WD21150 magnesium belongs to the magnesium alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ISO-WD21150 magnesium and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
69
Elongation at Break, % 5.7 to 11
8.4 to 10
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Tensile Strength: Ultimate (UTS), MPa 240 to 290
240 to 260
Tensile Strength: Yield (Proof), MPa 120 to 200
130

Thermal Properties

Latent Heat of Fusion, J/g 350
390
Maximum Temperature: Mechanical, °C 110
180
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 550
610
Specific Heat Capacity, J/kg-K 990
890
Thermal Conductivity, W/m-K 100
140
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
34
Electrical Conductivity: Equal Weight (Specific), % IACS 100
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.8
Embodied Carbon, kg CO2/kg material 23
8.4
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 980
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 24
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 460
120 to 130
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
49
Strength to Weight: Axial, points 40 to 48
24 to 26
Strength to Weight: Bending, points 52 to 58
31 to 32
Thermal Diffusivity, mm2/s 60
55
Thermal Shock Resistance, points 15 to 17
11

Alloy Composition

Aluminum (Al), % 2.4 to 3.6
92.3 to 98.6
Chromium (Cr), % 0
0 to 0.4
Copper (Cu), % 0 to 0.050
0 to 0.2
Iron (Fe), % 0 to 0.0050
0 to 0.8
Magnesium (Mg), % 94 to 97
1.4 to 1.8
Manganese (Mn), % 0.15 to 0.4
0 to 0.6
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.1
0 to 0.2
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.5 to 1.5
0 to 3.3
Residuals, % 0
0 to 0.15