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EN-MC21320 Magnesium vs. SAE-AISI H41 Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while SAE-AISI H41 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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-MC21320 magnesium and the bottom bar is SAE-AISI H41 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 230
710 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Melting Completion (Liquidus), °C 600
1560
Melting Onset (Solidus), °C 530
1510
Specific Heat Capacity, J/kg-K 1000
450
Thermal Conductivity, W/m-K 66
28
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
18
Density, g/cm3 1.6
8.1
Embodied Carbon, kg CO2/kg material 23
6.8
Embodied Energy, MJ/kg 160
97
Embodied Water, L/kg 980
97

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 38
24 to 76
Strength to Weight: Bending, points 50
22 to 47
Thermal Diffusivity, mm2/s 40
7.7
Thermal Shock Resistance, points 13
20 to 64

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.6 to 0.75
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
81.8 to 85
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.0 to 1.3
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0