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AZ61A Magnesium vs. SAE-AISI 5160 Steel

AZ61A magnesium belongs to the magnesium alloys classification, while SAE-AISI 5160 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 AZ61A magnesium and the bottom bar is SAE-AISI 5160 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
12 to 18
Fatigue Strength, MPa 130
180 to 650
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 150
390 to 700
Tensile Strength: Ultimate (UTS), MPa 280
660 to 1150
Tensile Strength: Yield (Proof), MPa 170
280 to 1010

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 120
420
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 530
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 79
43
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 62
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.1
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
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
73 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 310
200 to 2700
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 46
23 to 41
Strength to Weight: Bending, points 56
22 to 31
Thermal Diffusivity, mm2/s 47
12
Thermal Shock Resistance, points 17
19 to 34

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0.56 to 0.61
Chromium (Cr), % 0
0.7 to 0.9
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.0050
97.1 to 97.8
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0.75 to 1.0
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.1
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0