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EN-MC65220 Magnesium vs. EN 1.7729 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while EN 1.7729 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 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
270
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
17
Fatigue Strength, MPa 110
500
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 150
560
Tensile Strength: Ultimate (UTS), MPa 270
910
Tensile Strength: Yield (Proof), MPa 200
750

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 160
430
Melting Completion (Liquidus), °C 610
1470
Melting Onset (Solidus), °C 550
1430
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
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 80
3.8
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
3.3
Embodied Energy, MJ/kg 210
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
150
Resilience: Unit (Modulus of Resilience), kJ/m3 450
1500
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 40
32
Strength to Weight: Bending, points 49
27
Thermal Diffusivity, mm2/s 61
11
Thermal Shock Resistance, points 17
27

Alloy Composition


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Aluminum (Al), % 0
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0
0.17 to 0.23
Chromium (Cr), % 0
0.9 to 1.2
Copper (Cu), % 0.050 to 0.1
0 to 0.2
Iron (Fe), % 0 to 0.010
94.8 to 97
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.35 to 0.75
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.0050
0 to 0.2
Phosphorus (P), % 0
0 to 0.020
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
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
0.6 to 0.8
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0