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AZ91A Magnesium vs. EN 1.6570 Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.6570 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 1.6570 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
270 to 340
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
11 to 17
Fatigue Strength, MPa 99
500 to 660
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Tensile Strength: Ultimate (UTS), MPa 240
910 to 1130
Tensile Strength: Yield (Proof), MPa 160
760 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 360
250
Maximum Temperature: Mechanical, °C 130
440
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
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 52
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
3.9
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
1.7
Embodied Energy, MJ/kg 160
23
Embodied Water, L/kg 990
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1520 to 3010
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
32 to 40
Strength to Weight: Bending, points 49
27 to 31
Thermal Diffusivity, mm2/s 42
11
Thermal Shock Resistance, points 14
27 to 33

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.28 to 0.35
Chromium (Cr), % 0
1.0 to 1.4
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
94 to 96.2
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0 to 0.030
1.6 to 2.1
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0