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AZ91A Magnesium vs. EN 1.8881 Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.8881 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 1.8881 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
250
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
16
Fatigue Strength, MPa 99
460
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 140
510
Tensile Strength: Ultimate (UTS), MPa 240
830
Tensile Strength: Yield (Proof), MPa 160
710

Thermal Properties

Latent Heat of Fusion, J/g 360
260
Maximum Temperature: Mechanical, °C 130
420
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
40
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 52
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
3.7
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 22
1.9
Embodied Energy, MJ/kg 160
26
Embodied Water, L/kg 990
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
120
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1320
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
29
Strength to Weight: Bending, points 49
25
Thermal Diffusivity, mm2/s 42
11
Thermal Shock Resistance, points 14
24

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Boron (B), % 0
0 to 0.0050
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
0 to 1.5
Copper (Cu), % 0 to 0.1
0 to 0.3
Iron (Fe), % 0
91.9 to 100
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.7
Molybdenum (Mo), % 0
0 to 0.7
Nickel (Ni), % 0 to 0.030
0 to 2.5
Niobium (Nb), % 0
0 to 0.060
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0
0 to 0.0080
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0
0 to 0.12
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
0 to 0.15