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EN-MC21210 Magnesium vs. EN 1.7779 Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while EN 1.7779 steel belongs to the iron alloys. There are 31 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 EN-MC21210 magnesium and the bottom bar is EN 1.7779 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
240
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 14
16
Fatigue Strength, MPa 70
430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 110
500
Tensile Strength: Ultimate (UTS), MPa 190
810
Tensile Strength: Yield (Proof), MPa 90
660

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Maximum Temperature: Mechanical, °C 100
470
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 120
39
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
4.0
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 24
2.8
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 980
64

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
120
Resilience: Unit (Modulus of Resilience), kJ/m3 92
1150
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 32
29
Strength to Weight: Bending, points 44
25
Thermal Diffusivity, mm2/s 76
11
Thermal Shock Resistance, points 11
23

Alloy Composition


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Aluminum (Al), % 1.6 to 2.6
0 to 0.040
Carbon (C), % 0
0.17 to 0.23
Chromium (Cr), % 0
3.0 to 3.3
Copper (Cu), % 0 to 0.010
0 to 0.3
Iron (Fe), % 0 to 0.0050
93.8 to 95.4
Magnesium (Mg), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
0.3 to 0.5
Molybdenum (Mo), % 0
0.5 to 0.6
Nickel (Ni), % 0 to 0.0020
0 to 0.3
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.1
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Vanadium (V), % 0
0.45 to 0.55
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0