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7003 Aluminum vs. SAE-AISI 1055 Steel

7003 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1055 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 7003 aluminum and the bottom bar is SAE-AISI 1055 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 11
11 to 14
Fatigue Strength, MPa 130 to 150
260 to 390
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 210 to 230
440 to 450
Tensile Strength: Ultimate (UTS), MPa 350 to 390
730 to 750
Tensile Strength: Yield (Proof), MPa 300 to 310
400 to 630

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 200
400
Melting Completion (Liquidus), °C 630
1460
Melting Onset (Solidus), °C 510
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
51
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
11
Electrical Conductivity: Equal Weight (Specific), % IACS 110
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 41
80 to 85
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 710
440 to 1070
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 33 to 37
26
Strength to Weight: Bending, points 37 to 40
23
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 15 to 17
23 to 24

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
0
Carbon (C), % 0
0.5 to 0.6
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.35
98.4 to 98.9
Magnesium (Mg), % 0.5 to 1.0
0
Manganese (Mn), % 0 to 0.3
0.6 to 0.9
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.3
0
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.0 to 6.5
0
Zirconium (Zr), % 0.050 to 0.25
0
Residuals, % 0 to 0.15
0