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4145 Aluminum vs. ZK61A Magnesium

4145 aluminum belongs to the aluminum alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 4145 aluminum and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
46
Elongation at Break, % 2.2
5.8 to 7.1
Fatigue Strength, MPa 48
120 to 140
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
18
Shear Strength, MPa 69
170 to 180
Tensile Strength: Ultimate (UTS), MPa 120
290 to 310
Tensile Strength: Yield (Proof), MPa 68
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 540
330
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 590
640
Melting Onset (Solidus), °C 520
530
Specific Heat Capacity, J/kg-K 880
960
Thermal Conductivity, W/m-K 100
120
Thermal Expansion, µm/m-K 21
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
29
Electrical Conductivity: Equal Weight (Specific), % IACS 84
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 2.8
1.9
Embodied Carbon, kg CO2/kg material 7.6
23
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1040
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 31
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
62
Strength to Weight: Axial, points 12
42 to 45
Strength to Weight: Bending, points 19
50 to 53
Thermal Diffusivity, mm2/s 42
65
Thermal Shock Resistance, points 5.5
17 to 18

Alloy Composition

Aluminum (Al), % 83 to 87.4
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0 to 0.1
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.15
92.1 to 93.9
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 9.3 to 10.7
0
Zinc (Zn), % 0 to 0.2
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3