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2017 Aluminum vs. EN 1.6781 Steel

2017 aluminum belongs to the aluminum alloys classification, while EN 1.6781 steel belongs to the iron alloys. There are 29 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 2017 aluminum and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 12 to 18
17
Fatigue Strength, MPa 90 to 130
450
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 190 to 430
830
Tensile Strength: Yield (Proof), MPa 76 to 260
680

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Maximum Temperature: Mechanical, °C 190
450
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 510
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
44
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 110
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 10
5.0
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.9
Embodied Energy, MJ/kg 150
25
Embodied Water, L/kg 1140
60

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 66
130
Resilience: Unit (Modulus of Resilience), kJ/m3 41 to 470
1220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 17 to 40
29
Strength to Weight: Bending, points 24 to 42
25
Thermal Diffusivity, mm2/s 56
12
Thermal Shock Resistance, points 7.9 to 18
24

Alloy Composition

Aluminum (Al), % 91.6 to 95.5
0
Carbon (C), % 0
0.15 to 0.19
Chromium (Cr), % 0 to 0.1
1.3 to 1.8
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 0.7
92.6 to 94.6
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 1.0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 0
3.0 to 3.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0.2 to 0.8
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0