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WE43B Magnesium vs. SAE-AISI 50B44 Steel

WE43B magnesium belongs to the magnesium alloys classification, while SAE-AISI 50B44 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 WE43B magnesium and the bottom bar is SAE-AISI 50B44 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
22
Fatigue Strength, MPa 110
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 140
360
Tensile Strength: Ultimate (UTS), MPa 250
570
Tensile Strength: Yield (Proof), MPa 200
360

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 960
470
Thermal Conductivity, W/m-K 51
46
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 53
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.0
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 28
1.4
Embodied Energy, MJ/kg 250
19
Embodied Water, L/kg 910
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.2
110
Resilience: Unit (Modulus of Resilience), kJ/m3 430
350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 61
24
Strength to Weight: Axial, points 36
20
Strength to Weight: Bending, points 46
20
Thermal Diffusivity, mm2/s 28
12
Thermal Shock Resistance, points 15
17

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0
0.43 to 0.48
Chromium (Cr), % 0
0.2 to 0.6
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.010
97.5 to 98.5
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 89.8 to 93.5
0
Manganese (Mn), % 0 to 0.030
0.75 to 1.0
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 2.4 to 4.4
0
Yttrium (Y), % 3.7 to 4.3
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0