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ISO-WD32250 Magnesium vs. SAE-AISI D4 Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while SAE-AISI D4 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.5 to 8.6
8.4 to 15
Fatigue Strength, MPa 170 to 210
310 to 920
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
74
Shear Strength, MPa 180 to 190
460 to 1210
Tensile Strength: Ultimate (UTS), MPa 310 to 330
760 to 2060
Tensile Strength: Yield (Proof), MPa 240 to 290
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 130
31
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
8.0
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 24
3.3
Embodied Energy, MJ/kg 160
49
Embodied Water, L/kg 950
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
100 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
25
Strength to Weight: Axial, points 49 to 51
27 to 75
Strength to Weight: Bending, points 58 to 60
24 to 47
Thermal Diffusivity, mm2/s 72
8.3
Thermal Shock Resistance, points 19 to 20
23 to 63

Alloy Composition


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Carbon (C), % 0
2.1 to 2.4
Chromium (Cr), % 0
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0
80.6 to 86.3
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0 to 1.0
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0