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EN-MC65220 Magnesium vs. EN 1.7390 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while EN 1.7390 steel belongs to the iron alloys. There are 30 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 EN-MC65220 magnesium and the bottom bar is EN 1.7390 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
210
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
16
Fatigue Strength, MPa 110
310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
74
Shear Strength, MPa 150
440
Tensile Strength: Ultimate (UTS), MPa 270
710
Tensile Strength: Yield (Proof), MPa 200
480

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Maximum Temperature: Mechanical, °C 160
510
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 110
40
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 120
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
4.3
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
1.7
Embodied Energy, MJ/kg 210
23

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
100
Resilience: Unit (Modulus of Resilience), kJ/m3 450
600
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
25
Strength to Weight: Bending, points 49
23
Thermal Diffusivity, mm2/s 61
11
Thermal Shock Resistance, points 17
20

Alloy Composition


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Carbon (C), % 0
0 to 0.18
Chromium (Cr), % 0
4.0 to 6.0
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
91.9 to 95.3
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.3 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.65
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.010
0 to 0.4
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.015
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0