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ISO-WD32250 Magnesium vs. ZA-8

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while ZA-8 belongs to the zinc alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 ISO-WD32250 magnesium and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
85 to 86
Elongation at Break, % 4.5 to 8.6
1.3 to 8.0
Fatigue Strength, MPa 170 to 210
51 to 100
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 17
34
Shear Strength, MPa 180 to 190
240 to 280
Tensile Strength: Ultimate (UTS), MPa 310 to 330
210 to 370
Tensile Strength: Yield (Proof), MPa 240 to 290
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 340
110
Maximum Temperature: Mechanical, °C 120
100
Melting Completion (Liquidus), °C 600
400
Melting Onset (Solidus), °C 550
380
Specific Heat Capacity, J/kg-K 980
440
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
28
Electrical Conductivity: Equal Weight (Specific), % IACS 130
40

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 1.8
6.3
Embodied Carbon, kg CO2/kg material 24
3.3
Embodied Energy, MJ/kg 160
62
Embodied Water, L/kg 950
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
260 to 490
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 67
23
Strength to Weight: Axial, points 49 to 51
9.3 to 17
Strength to Weight: Bending, points 58 to 60
12 to 18
Thermal Diffusivity, mm2/s 72
42
Thermal Shock Resistance, points 19 to 20
7.6 to 13

Alloy Composition


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Aluminum (Al), % 0
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Copper (Cu), % 0
0.8 to 1.3
Iron (Fe), % 0
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 94.9 to 97.1
0.015 to 0.030
Nickel (Ni), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.045
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 2.5 to 4.0
89.7 to 91.2
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0