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EN 1.6957 Steel vs. 2017A Aluminum

EN 1.6957 steel belongs to the iron alloys classification, while 2017A aluminum belongs to the aluminum alloys. There are 30 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 EN 1.6957 steel and the bottom bar is 2017A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 18
2.2 to 14
Fatigue Strength, MPa 530
92 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 570
120 to 270
Tensile Strength: Ultimate (UTS), MPa 930
200 to 460
Tensile Strength: Yield (Proof), MPa 780
110 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 450
220
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
510
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 47
150
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
34
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
100

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
11
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 2.1
8.2
Embodied Energy, MJ/kg 29
150
Embodied Water, L/kg 60
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
6.7 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 1630
90 to 570
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 33
19 to 42
Strength to Weight: Bending, points 27
26 to 44
Thermal Diffusivity, mm2/s 13
56
Thermal Shock Resistance, points 27
8.9 to 20

Alloy Composition

Aluminum (Al), % 0
91.3 to 95.5
Carbon (C), % 0.22 to 0.32
0
Chromium (Cr), % 1.2 to 1.8
0 to 0.1
Copper (Cu), % 0
3.5 to 4.5
Iron (Fe), % 92.7 to 94.7
0 to 0.7
Magnesium (Mg), % 0
0.4 to 1.0
Manganese (Mn), % 0.15 to 0.4
0.4 to 1.0
Molybdenum (Mo), % 0.25 to 0.45
0
Nickel (Ni), % 3.4 to 4.0
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.15
0.2 to 0.8
Sulfur (S), % 0 to 0.0070
0
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0.050 to 0.15
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15