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WE43B Magnesium vs. SAE-AISI 1084 Steel

WE43B magnesium belongs to the magnesium alloys classification, while SAE-AISI 1084 steel belongs to the iron alloys. There are 30 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 WE43B magnesium and the bottom bar is SAE-AISI 1084 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
11
Fatigue Strength, MPa 110
320 to 370
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
72
Shear Strength, MPa 140
470 to 550
Tensile Strength: Ultimate (UTS), MPa 250
780 to 930
Tensile Strength: Yield (Proof), MPa 200
510 to 600

Thermal Properties

Latent Heat of Fusion, J/g 330
240
Maximum Temperature: Mechanical, °C 180
400
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 960
470
Thermal Conductivity, W/m-K 51
51
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 53
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 34
1.8
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
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.2
81 to 89
Resilience: Unit (Modulus of Resilience), kJ/m3 430
700 to 960
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 61
24
Strength to Weight: Axial, points 36
28 to 33
Strength to Weight: Bending, points 46
24 to 27
Thermal Diffusivity, mm2/s 28
14
Thermal Shock Resistance, points 15
25 to 30

Alloy Composition

Carbon (C), % 0
0.8 to 0.93
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.010
98.1 to 98.6
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 89.8 to 93.5
0
Manganese (Mn), % 0 to 0.030
0.6 to 0.9
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
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