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EN-MC65220 Magnesium vs. SAE-AISI M3 Class 2 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while SAE-AISI M3 class 2 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, 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 SAE-AISI M3 class 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
77
Tensile Strength: Ultimate (UTS), MPa 270
770 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Melting Completion (Liquidus), °C 610
1620
Melting Onset (Solidus), °C 550
1570
Specific Heat Capacity, J/kg-K 980
440
Thermal Conductivity, W/m-K 110
26
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
25
Density, g/cm3 1.9
8.3
Embodied Carbon, kg CO2/kg material 27
12
Embodied Energy, MJ/kg 210
180

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
23
Strength to Weight: Axial, points 40
26 to 74
Strength to Weight: Bending, points 49
22 to 45
Thermal Diffusivity, mm2/s 61
7.2
Thermal Shock Resistance, points 17
24 to 69

Alloy Composition


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Carbon (C), % 0
1.2 to 1.3
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0.050 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.010
75.8 to 82.3
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.15 to 0.4
Molybdenum (Mo), % 0
4.8 to 6.5
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0.2 to 0.45
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
5.0 to 6.8
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
2.8 to 3.8
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0