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4006 Aluminum vs. EN 1.6771 Steel

4006 aluminum belongs to the aluminum alloys classification, while EN 1.6771 steel belongs to the iron alloys. There are 30 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 4006 aluminum and the bottom bar is EN 1.6771 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 28 to 45
280 to 350
Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 3.4 to 24
8.0 to 8.7
Fatigue Strength, MPa 35 to 110
440 to 680
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 110 to 160
930 to 1180
Tensile Strength: Yield (Proof), MPa 62 to 140
740 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 160
440
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 620
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 220
46
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 180
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
5.0
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.1
1.9
Embodied Energy, MJ/kg 150
25
Embodied Water, L/kg 1180
58

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.1 to 26
75 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 28 to 130
1460 to 3450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 11 to 16
33 to 41
Strength to Weight: Bending, points 19 to 24
27 to 31
Thermal Diffusivity, mm2/s 89
13
Thermal Shock Resistance, points 4.9 to 7.0
27 to 35

Alloy Composition

Aluminum (Al), % 97.4 to 98.7
0
Carbon (C), % 0
0.27 to 0.33
Chromium (Cr), % 0 to 0.2
0.8 to 1.2
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0.5 to 0.8
92.2 to 95
Magnesium (Mg), % 0 to 0.010
0
Manganese (Mn), % 0 to 0.050
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 0
3.0 to 4.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.8 to 1.2
0 to 0.6
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0 to 0.15
0

Comparable Variants