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EN-MC95310 Magnesium vs. SAE-AISI 5140 Steel

EN-MC95310 magnesium belongs to the magnesium alloys classification, while SAE-AISI 5140 steel belongs to the iron alloys. 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-MC95310 magnesium and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
170 to 290
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 2.2
12 to 29
Fatigue Strength, MPa 110
220 to 570
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 160
360 to 600
Tensile Strength: Ultimate (UTS), MPa 280
560 to 970
Tensile Strength: Yield (Proof), MPa 190
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 170
420
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 960
470
Thermal Conductivity, W/m-K 51
45
Thermal Expansion, µm/m-K 25
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 50
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.1
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 29
1.4
Embodied Energy, MJ/kg 260
19
Embodied Water, L/kg 900
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 420
220 to 1880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 61
24
Strength to Weight: Axial, points 40
20 to 34
Strength to Weight: Bending, points 49
19 to 28
Thermal Diffusivity, mm2/s 28
12
Thermal Shock Resistance, points 18
16 to 29

Alloy Composition


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Carbon (C), % 0
0.38 to 0.43
Chromium (Cr), % 0
0.7 to 0.9
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
97.3 to 98.1
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 88.9 to 93.4
0
Manganese (Mn), % 0 to 0.15
0.7 to 0.9
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.010
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 1.5 to 4.0
0
Yttrium (Y), % 4.8 to 5.5
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0