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7108 Aluminum vs. EN 1.8873 Steel

7108 aluminum belongs to the aluminum alloys classification, while EN 1.8873 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7108 aluminum and the bottom bar is EN 1.8873 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
19
Fatigue Strength, MPa 120
340
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 210
410
Tensile Strength: Ultimate (UTS), MPa 350
660
Tensile Strength: Yield (Proof), MPa 290
490

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 210
420
Melting Completion (Liquidus), °C 630
1460
Melting Onset (Solidus), °C 530
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
39
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.2
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.8
Embodied Energy, MJ/kg 150
24
Embodied Water, L/kg 1150
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
110
Resilience: Unit (Modulus of Resilience), kJ/m3 620
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 34
23
Strength to Weight: Bending, points 38
21
Thermal Diffusivity, mm2/s 59
10
Thermal Shock Resistance, points 16
19

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0
Boron (B), % 0
0 to 0.0050
Carbon (C), % 0
0 to 0.18
Chromium (Cr), % 0
0 to 1.0
Copper (Cu), % 0 to 0.050
0 to 0.3
Iron (Fe), % 0 to 0.1
93.6 to 100
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0 to 1.7
Molybdenum (Mo), % 0
0 to 0.7
Nickel (Ni), % 0
0 to 1.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.6
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.050
0 to 0.050
Vanadium (V), % 0
0 to 0.080
Zinc (Zn), % 4.5 to 5.5
0
Zirconium (Zr), % 0.12 to 0.25
0 to 0.15
Residuals, % 0 to 0.15
0