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7003 Aluminum vs. 3203 Aluminum

Both 7003 aluminum and 3203 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is 7003 aluminum and the bottom bar is 3203 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 11
4.5 to 29
Fatigue Strength, MPa 130 to 150
46 to 92
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 210 to 230
72 to 120
Tensile Strength: Ultimate (UTS), MPa 350 to 390
110 to 200
Tensile Strength: Yield (Proof), MPa 300 to 310
39 to 190

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 200
180
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 510
620
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
170
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
43
Electrical Conductivity: Equal Weight (Specific), % IACS 110
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 8.1
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 41
8.0 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 710
11 to 250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 33 to 37
11 to 20
Strength to Weight: Bending, points 37 to 40
19 to 28
Thermal Diffusivity, mm2/s 59
70
Thermal Shock Resistance, points 15 to 17
4.9 to 8.8

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
96.9 to 99
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.2
0 to 0.050
Iron (Fe), % 0 to 0.35
0 to 0.7
Magnesium (Mg), % 0.5 to 1.0
0
Manganese (Mn), % 0 to 0.3
1.0 to 1.5
Silicon (Si), % 0 to 0.3
0 to 0.6
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.0 to 6.5
0 to 0.1
Zirconium (Zr), % 0.050 to 0.25
0
Residuals, % 0
0 to 0.15