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7204 Aluminum vs. SAE-AISI 1090 Steel

7204 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1090 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 7204 aluminum and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 11 to 13
11
Fatigue Strength, MPa 110 to 130
320 to 380
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 130 to 220
470 to 570
Tensile Strength: Ultimate (UTS), MPa 220 to 380
790 to 950
Tensile Strength: Yield (Proof), MPa 120 to 310
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 380
240
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
50
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.4
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
730 to 1000
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 21 to 36
28 to 34
Strength to Weight: Bending, points 28 to 40
24 to 27
Thermal Diffusivity, mm2/s 58
13
Thermal Shock Resistance, points 9.4 to 16
25 to 31

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
0
Carbon (C), % 0
0.85 to 1.0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.35
98 to 98.6
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0.2 to 0.7
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
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0