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ZK40A Magnesium vs. AISI 405 Stainless Steel

ZK40A magnesium belongs to the magnesium alloys classification, while AISI 405 stainless steel belongs to the iron 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 ZK40A magnesium and the bottom bar is AISI 405 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.2
22
Fatigue Strength, MPa 190
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 160
300
Tensile Strength: Ultimate (UTS), MPa 280
470
Tensile Strength: Yield (Proof), MPa 260
200

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Mechanical, °C 120
820
Melting Completion (Liquidus), °C 600
1530
Melting Onset (Solidus), °C 540
1480
Specific Heat Capacity, J/kg-K 970
480
Thermal Conductivity, W/m-K 110
30
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
7.0
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 24
2.0
Embodied Energy, MJ/kg 160
28
Embodied Water, L/kg 950
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
84
Resilience: Unit (Modulus of Resilience), kJ/m3 740
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 43
17
Strength to Weight: Bending, points 53
17
Thermal Diffusivity, mm2/s 62
8.1
Thermal Shock Resistance, points 17
16

Alloy Composition


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Aluminum (Al), % 0
0.1 to 0.3
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
11.5 to 14.5
Iron (Fe), % 0
82.5 to 88.4
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0