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AZ91A Magnesium vs. EN 1.5501 Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.5501 steel belongs to the iron alloys. There are 31 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 AZ91A magnesium and the bottom bar is EN 1.5501 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
120 to 150
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
12 to 17
Fatigue Strength, MPa 99
180 to 270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 140
270 to 310
Tensile Strength: Ultimate (UTS), MPa 240
390 to 510
Tensile Strength: Yield (Proof), MPa 160
260 to 420

Thermal Properties

Latent Heat of Fusion, J/g 360
250
Maximum Temperature: Mechanical, °C 130
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 470
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
52
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
1.4
Embodied Energy, MJ/kg 160
18
Embodied Water, L/kg 990
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
40 to 83
Resilience: Unit (Modulus of Resilience), kJ/m3 280
190 to 460
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
14 to 18
Strength to Weight: Bending, points 49
15 to 18
Thermal Diffusivity, mm2/s 42
14
Thermal Shock Resistance, points 14
11 to 15

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0
0.13 to 0.16
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
98.4 to 99.269
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.6 to 0.8
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.3
Sulfur (S), % 0
0 to 0.025
Zinc (Zn), % 0.35 to 1.0
0