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ISO-WD32250 Magnesium vs. SAE-AISI H42 Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while SAE-AISI H42 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 ISO-WD32250 magnesium and the bottom bar is SAE-AISI H42 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 17
77
Tensile Strength: Ultimate (UTS), MPa 310 to 330
700 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Melting Completion (Liquidus), °C 600
1620
Melting Onset (Solidus), °C 550
1570
Specific Heat Capacity, J/kg-K 980
440
Thermal Conductivity, W/m-K 130
24
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 13
24
Density, g/cm3 1.8
8.4
Embodied Carbon, kg CO2/kg material 24
8.8
Embodied Energy, MJ/kg 160
130
Embodied Water, L/kg 950
98

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 67
23
Strength to Weight: Axial, points 49 to 51
23 to 65
Strength to Weight: Bending, points 58 to 60
21 to 42
Thermal Diffusivity, mm2/s 72
6.5
Thermal Shock Resistance, points 19 to 20
20 to 57

Alloy Composition


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Carbon (C), % 0
0.55 to 0.7
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0
79.3 to 83.8
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.5 to 5.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
5.5 to 6.8
Vanadium (V), % 0
1.8 to 2.2
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0