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7049 Aluminum vs. AM60B Magnesium

7049 aluminum belongs to the aluminum alloys classification, while AM60B magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7049 aluminum and the bottom bar is AM60B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
62
Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 6.2 to 7.0
11
Fatigue Strength, MPa 160 to 170
96
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 300 to 310
140
Tensile Strength: Ultimate (UTS), MPa 510 to 530
230
Tensile Strength: Yield (Proof), MPa 420 to 450
130

Thermal Properties

Latent Heat of Fusion, J/g 370
350
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 640
620
Melting Onset (Solidus), °C 480
540
Specific Heat Capacity, J/kg-K 860
1000
Thermal Conductivity, W/m-K 130
61
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
13
Electrical Conductivity: Equal Weight (Specific), % IACS 110
72

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
1.7
Embodied Carbon, kg CO2/kg material 8.1
23
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1110
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
21
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
190
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 45
71
Strength to Weight: Axial, points 46 to 47
38
Strength to Weight: Bending, points 46 to 47
50
Thermal Diffusivity, mm2/s 51
37
Thermal Shock Resistance, points 22 to 23
14

Alloy Composition


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Aluminum (Al), % 85.7 to 89.5
5.5 to 6.5
Chromium (Cr), % 0.1 to 0.22
0
Copper (Cu), % 1.2 to 1.9
0 to 0.010
Iron (Fe), % 0 to 0.35
0 to 0.0050
Magnesium (Mg), % 2.0 to 2.9
92.6 to 94.3
Manganese (Mn), % 0 to 0.2
0.24 to 0.6
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0 to 0.25
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
0 to 0.22
Residuals, % 0 to 0.15
0