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AS41B Magnesium vs. Zamak 7

AS41B magnesium belongs to the magnesium alloys classification, while Zamak 7 belongs to the zinc alloys. There are 30 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 AS41B magnesium and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
86
Elongation at Break, % 6.0
13
Fatigue Strength, MPa 97
47
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 18
33
Shear Strength, MPa 120
210
Tensile Strength: Ultimate (UTS), MPa 210
280
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 370
120
Maximum Temperature: Mechanical, °C 110
95
Melting Completion (Liquidus), °C 620
390
Melting Onset (Solidus), °C 570
380
Specific Heat Capacity, J/kg-K 1000
410
Thermal Conductivity, W/m-K 68
110
Thermal Expansion, µm/m-K 26
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
27
Electrical Conductivity: Equal Weight (Specific), % IACS 92
38

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
6.4
Embodied Carbon, kg CO2/kg material 23
3.0
Embodied Energy, MJ/kg 160
57
Embodied Water, L/kg 980
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
36
Resilience: Unit (Modulus of Resilience), kJ/m3 220
370
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 72
23
Strength to Weight: Axial, points 35
12
Strength to Weight: Bending, points 47
15
Thermal Diffusivity, mm2/s 41
43
Thermal Shock Resistance, points 13
8.6

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0 to 0.020
0 to 0.25
Iron (Fe), % 0 to 0.0035
0 to 0.075
Lead (Pb), % 0
0 to 0.0030
Magnesium (Mg), % 92.7 to 95.7
0.0050 to 0.020
Manganese (Mn), % 0.35 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0.0050 to 0.020
Silicon (Si), % 0.5 to 1.5
0
Tin (Sn), % 0
0 to 0.0010
Zinc (Zn), % 0 to 0.12
95.3 to 96.5