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EN-MC65220 Magnesium vs. EN 1.7703 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while EN 1.7703 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
20
Fatigue Strength, MPa 110
320 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
74
Shear Strength, MPa 150
420 to 430
Tensile Strength: Ultimate (UTS), MPa 270
670 to 690
Tensile Strength: Yield (Proof), MPa 200
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 160
460
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
39
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
4.2
Density, g/cm3 1.9
7.9
Embodied Carbon, kg CO2/kg material 27
2.5
Embodied Energy, MJ/kg 210
35

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 450
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 40
24
Strength to Weight: Bending, points 49
22
Thermal Diffusivity, mm2/s 61
11
Thermal Shock Resistance, points 17
19 to 20

Alloy Composition


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Carbon (C), % 0
0.11 to 0.15
Chromium (Cr), % 0
2.0 to 2.5
Copper (Cu), % 0.050 to 0.1
0 to 0.2
Iron (Fe), % 0 to 0.010
94.6 to 96.4
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0 to 0.0050
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0 to 0.1
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0