MakeItFrom.com
Menu (ESC)

7021 Aluminum vs. 7003 Aluminum

Both 7021 aluminum and 7003 aluminum are aluminum alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.4
11
Fatigue Strength, MPa 150
130 to 150
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 270
210 to 230
Tensile Strength: Ultimate (UTS), MPa 460
350 to 390
Tensile Strength: Yield (Proof), MPa 390
300 to 310

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
36
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.9
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
37 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
630 to 710
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
47
Strength to Weight: Axial, points 44
33 to 37
Strength to Weight: Bending, points 45
37 to 40
Thermal Diffusivity, mm2/s 59
59
Thermal Shock Resistance, points 20
15 to 17

Alloy Composition


Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 452
Aluminum (Al), % 90.7 to 93.7
90.6 to 94.5
Chromium (Cr), % 0 to 0.050
0 to 0.2
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 0 to 0.4
0 to 0.35
Magnesium (Mg), % 1.2 to 1.8
0.5 to 1.0
Manganese (Mn), % 0 to 0.1
0 to 0.3
Silicon (Si), % 0 to 0.25
0 to 0.3
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 5.0 to 6.0
5.0 to 6.5
Zirconium (Zr), % 0.080 to 0.18
0.050 to 0.25
Residuals, % 0 to 0.15
0 to 0.15