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SAE-AISI 1008 Steel vs. 7050 Aluminum

SAE-AISI 1008 steel belongs to the iron alloys classification, while 7050 aluminum belongs to the aluminum 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 SAE-AISI 1008 steel and the bottom bar is 7050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 22 to 33
2.2 to 12
Fatigue Strength, MPa 150 to 220
130 to 210
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
26
Shear Strength, MPa 220 to 230
280 to 330
Tensile Strength: Ultimate (UTS), MPa 330 to 370
490 to 570
Tensile Strength: Yield (Proof), MPa 190 to 310
390 to 500

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Maximum Temperature: Mechanical, °C 400
190
Melting Completion (Liquidus), °C 1470
630
Melting Onset (Solidus), °C 1430
490
Specific Heat Capacity, J/kg-K 470
860
Thermal Conductivity, W/m-K 62
140
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
35
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
100

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
10
Density, g/cm3 7.9
3.1
Embodied Carbon, kg CO2/kg material 1.4
8.2
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 45
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 91
10 to 55
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 260
1110 to 1760
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 12 to 13
45 to 51
Strength to Weight: Bending, points 13 to 15
45 to 50
Thermal Diffusivity, mm2/s 17
54
Thermal Shock Resistance, points 10 to 12
21 to 25

Alloy Composition

Aluminum (Al), % 0
87.3 to 92.1
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 0
0 to 0.040
Copper (Cu), % 0
2.0 to 2.6
Iron (Fe), % 99.31 to 99.7
0 to 0.15
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 0.3 to 0.5
0 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.12
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.060
Zinc (Zn), % 0
5.7 to 6.7
Zirconium (Zr), % 0
0.080 to 0.15
Residuals, % 0
0 to 0.15