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EN-MC65220 Magnesium vs. ACI-ASTM CK35MN Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CK35MN steel belongs to the iron alloys. There are 29 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 ACI-ASTM CK35MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
190
Elastic (Young's, Tensile) Modulus, GPa 44
210
Elongation at Break, % 2.2
40
Fatigue Strength, MPa 110
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
81
Tensile Strength: Ultimate (UTS), MPa 270
650
Tensile Strength: Yield (Proof), MPa 200
310

Thermal Properties

Latent Heat of Fusion, J/g 340
310
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 110
12
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 80
31
Density, g/cm3 1.9
8.0
Embodied Carbon, kg CO2/kg material 27
5.9
Embodied Energy, MJ/kg 210
81

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
210
Resilience: Unit (Modulus of Resilience), kJ/m3 450
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
22
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 61
3.3
Thermal Shock Resistance, points 17
14

Alloy Composition


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Carbon (C), % 0
0 to 0.035
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0.050 to 0.1
0 to 0.4
Iron (Fe), % 0 to 0.010
43.4 to 51.8
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 6.8
Nickel (Ni), % 0 to 0.0050
20 to 22
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.010
0 to 1.0
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.020
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