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7108 Aluminum vs. EN 1.7338 Steel

7108 aluminum belongs to the aluminum alloys classification, while EN 1.7338 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 7108 aluminum and the bottom bar is EN 1.7338 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
23
Fatigue Strength, MPa 120
220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 210
310
Tensile Strength: Ultimate (UTS), MPa 350
490
Tensile Strength: Yield (Proof), MPa 290
300

Thermal Properties

Latent Heat of Fusion, J/g 380
260
Maximum Temperature: Mechanical, °C 210
430
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
40
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.1
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.6
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1150
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
97
Resilience: Unit (Modulus of Resilience), kJ/m3 620
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 34
17
Strength to Weight: Bending, points 38
18
Thermal Diffusivity, mm2/s 59
11
Thermal Shock Resistance, points 16
14

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0 to 0.040
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
1.0 to 1.5
Copper (Cu), % 0 to 0.050
0 to 0.3
Iron (Fe), % 0 to 0.1
95.4 to 97.8
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0.3 to 0.6
Molybdenum (Mo), % 0
0.45 to 0.65
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.1
0.5 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 4.5 to 5.5
0
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0 to 0.15
0