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AS41B Magnesium vs. SAE-AISI 1137 Steel

AS41B magnesium belongs to the magnesium alloys classification, while SAE-AISI 1137 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 1137 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
250 to 400
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 120
430 to 460
Tensile Strength: Ultimate (UTS), MPa 210
700 to 760
Tensile Strength: Yield (Proof), MPa 140
370 to 650

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
13

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
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
81 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 220
360 to 1130
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 35
25 to 27
Strength to Weight: Bending, points 47
22 to 24
Thermal Diffusivity, mm2/s 41
14
Thermal Shock Resistance, points 13
21 to 23

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.32 to 0.39
Copper (Cu), % 0 to 0.020
0
Iron (Fe), % 0 to 0.0035
97.8 to 98.3
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