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ZK40A Magnesium vs. SAE-AISI 1065 Steel

ZK40A magnesium belongs to the magnesium alloys classification, while SAE-AISI 1065 steel belongs to the iron 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. 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 ZK40A magnesium and the bottom bar is SAE-AISI 1065 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.2
11 to 14
Fatigue Strength, MPa 190
270 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 160
430 to 470
Tensile Strength: Ultimate (UTS), MPa 280
710 to 780
Tensile Strength: Yield (Proof), MPa 260
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 120
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
51
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
11
Electrical Conductivity: Equal Weight (Specific), % IACS 130
12

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 24
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 950
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
74 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 740
490 to 820
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 65
24
Strength to Weight: Axial, points 43
25 to 28
Strength to Weight: Bending, points 53
23 to 24
Thermal Diffusivity, mm2/s 62
14
Thermal Shock Resistance, points 17
25 to 27

Alloy Composition


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Carbon (C), % 0
0.6 to 0.7
Iron (Fe), % 0
98.3 to 98.8
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0.6 to 0.9
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0