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ZK40A Magnesium vs. EN 1.4518 Stainless Steel

ZK40A magnesium belongs to the magnesium alloys classification, while EN 1.4518 stainless steel belongs to the iron alloys. There are 29 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 ZK40A magnesium and the bottom bar is EN 1.4518 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.2
34
Fatigue Strength, MPa 190
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
79
Tensile Strength: Ultimate (UTS), MPa 280
490
Tensile Strength: Yield (Proof), MPa 260
210

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Mechanical, °C 120
1000
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 540
1400
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
20
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 24
4.0
Embodied Energy, MJ/kg 160
55
Embodied Water, L/kg 950
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
140
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
18
Thermal Diffusivity, mm2/s 62
4.1
Thermal Shock Resistance, points 17
14

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 0
61.4 to 70
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
3.0 to 3.5
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.5
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