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EN 1.3558 Steel vs. ZK51A Magnesium

EN 1.3558 steel belongs to the iron alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 EN 1.3558 steel and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
45
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 770
240

Thermal Properties

Latent Heat of Fusion, J/g 240
340
Maximum Temperature: Mechanical, °C 490
120
Melting Completion (Liquidus), °C 1810
640
Melting Onset (Solidus), °C 1760
550
Specific Heat Capacity, J/kg-K 410
970
Thermal Conductivity, W/m-K 20
110
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
28
Electrical Conductivity: Equal Weight (Specific), % IACS 12
140

Otherwise Unclassified Properties

Base Metal Price, % relative 45
13
Density, g/cm3 9.3
1.8
Embodied Carbon, kg CO2/kg material 8.4
24
Embodied Energy, MJ/kg 130
160
Embodied Water, L/kg 90
940

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
64
Strength to Weight: Axial, points 23
36
Strength to Weight: Bending, points 20
47
Thermal Diffusivity, mm2/s 5.3
61
Thermal Shock Resistance, points 22
15

Alloy Composition

Carbon (C), % 0.7 to 0.8
0
Chromium (Cr), % 3.9 to 4.3
0
Copper (Cu), % 0 to 0.3
0 to 0.1
Iron (Fe), % 73.7 to 77.6
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0 to 0.4
0
Molybdenum (Mo), % 0 to 0.6
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3