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QE22A Magnesium vs. Zamak 7

QE22A magnesium belongs to the magnesium alloys classification, while Zamak 7 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is QE22A magnesium and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
80
Compressive (Crushing) Strength, MPa 350
410
Elastic (Young's, Tensile) Modulus, GPa 44
86
Elongation at Break, % 2.4
13
Fatigue Strength, MPa 110
47
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 17
33
Shear Strength, MPa 150
210
Tensile Strength: Ultimate (UTS), MPa 250
280
Tensile Strength: Yield (Proof), MPa 190
250

Thermal Properties

Latent Heat of Fusion, J/g 340
120
Maximum Temperature: Mechanical, °C 250
95
Melting Completion (Liquidus), °C 640
390
Melting Onset (Solidus), °C 570
380
Solidification (Pattern Maker's) Shrinkage, % 1.3
1.2
Specific Heat Capacity, J/kg-K 970
410
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 27
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
27
Electrical Conductivity: Equal Weight (Specific), % IACS 120
38

Otherwise Unclassified Properties

Density, g/cm3 2.0
6.4
Embodied Carbon, kg CO2/kg material 27
3.0
Embodied Energy, MJ/kg 220
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
36
Resilience: Unit (Modulus of Resilience), kJ/m3 400
370
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 60
23
Strength to Weight: Axial, points 36
12
Strength to Weight: Bending, points 46
15
Thermal Diffusivity, mm2/s 59
43
Thermal Shock Resistance, points 15
8.6

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
0 to 0.075
Lead (Pb), % 0
0 to 0.0030
Magnesium (Mg), % 93.1 to 95.8
0.0050 to 0.020
Nickel (Ni), % 0 to 0.010
0.0050 to 0.020
Silver (Ag), % 2.0 to 3.0
0
Tin (Sn), % 0
0 to 0.0010
Unspecified Rare Earths, % 1.8 to 2.5
0
Zinc (Zn), % 0
95.3 to 96.5
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0