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SAE-AISI 1023 Steel vs. 7003 Aluminum

SAE-AISI 1023 steel belongs to the iron alloys classification, while 7003 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 1023 steel and the bottom bar is 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 17 to 29
11
Fatigue Strength, MPa 180 to 270
130 to 150
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
26
Shear Strength, MPa 280 to 300
210 to 230
Tensile Strength: Ultimate (UTS), MPa 430 to 480
350 to 390
Tensile Strength: Yield (Proof), MPa 240 to 410
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
380
Maximum Temperature: Mechanical, °C 400
200
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1420
510
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 53
150
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
36
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
110

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.9
2.9
Embodied Carbon, kg CO2/kg material 1.4
8.1
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 45
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 100
37 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 450
630 to 710
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 15 to 17
33 to 37
Strength to Weight: Bending, points 16 to 17
37 to 40
Thermal Diffusivity, mm2/s 14
59
Thermal Shock Resistance, points 14 to 15
15 to 17

Alloy Composition

Aluminum (Al), % 0
90.6 to 94.5
Carbon (C), % 0.2 to 0.25
0
Chromium (Cr), % 0
0 to 0.2
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 99.06 to 99.5
0 to 0.35
Magnesium (Mg), % 0
0.5 to 1.0
Manganese (Mn), % 0.3 to 0.6
0 to 0.3
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.3
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
5.0 to 6.5
Zirconium (Zr), % 0
0.050 to 0.25
Residuals, % 0
0 to 0.15