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AS41B Magnesium vs. SAE-AISI 1141 Steel

AS41B magnesium belongs to the magnesium alloys classification, while SAE-AISI 1141 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 AS41B magnesium and the bottom bar is SAE-AISI 1141 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 6.0
11 to 17
Fatigue Strength, MPa 97
270 to 430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
72
Shear Strength, MPa 120
460 to 480
Tensile Strength: Ultimate (UTS), MPa 210
740 to 810
Tensile Strength: Yield (Proof), MPa 140
400 to 700

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 110
400
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 68
51
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
10
Electrical Conductivity: Equal Weight (Specific), % IACS 92
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.9
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 980
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
86 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 220
430 to 1290
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 35
26 to 29
Strength to Weight: Bending, points 47
23 to 25
Thermal Diffusivity, mm2/s 41
14
Thermal Shock Resistance, points 13
24 to 26

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.37 to 0.45
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.0035
97.7 to 98.2
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
1.4 to 1.7
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0
Sulfur (S), % 0
0.080 to 0.13
Zinc (Zn), % 0 to 0.12
0