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7108 Aluminum vs. SAE-AISI 1008 Steel

7108 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1008 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 SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
22 to 33
Fatigue Strength, MPa 120
150 to 220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 210
220 to 230
Tensile Strength: Ultimate (UTS), MPa 350
330 to 370
Tensile Strength: Yield (Proof), MPa 290
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 630
1470
Melting Onset (Solidus), °C 530
1430
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
62
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 620
92 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 34
12 to 13
Strength to Weight: Bending, points 38
13 to 15
Thermal Diffusivity, mm2/s 59
17
Thermal Shock Resistance, points 16
10 to 12

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0
Carbon (C), % 0
0 to 0.1
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.1
99.31 to 99.7
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0.3 to 0.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.050
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