1100A (Al99.0Cu(A)) Aluminum
1100A aluminum is a 1000-series aluminum alloy: it is considered commercially pure, and is formulated for primary forming into wrought products. 1100A is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-1100A. Additionally, the EN chemical designation is Al99,0Cu(A). And the AFNOR (French) designation is A45.
It received its standard designation in 2005, making it a fairly young material.
The properties of 1100A aluminum include nine common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 1100A aluminum to: 1000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
69 GPa 10 x 106 psi
Elongation at Break
4.5 to 34 %
Fatigue Strength
35 to 74 MPa 5.0 to 11 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
59 to 99 MPa 8.6 to 14 x 103 psi
Tensile Strength: Ultimate (UTS)
89 to 170 MPa 13 to 25 x 103 psi
Tensile Strength: Yield (Proof)
29 to 150 MPa 4.1 to 21 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
640 °C 1190 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
230 W/m-K 130 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
60 % IACS
Electrical Conductivity: Equal Weight (Specific)
200 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.2 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1190 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
6.4 to 23 MJ/m3
Resilience: Unit (Modulus of Resilience)
5.9 to 150 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
9.1 to 17 points
Strength to Weight: Bending
16 to 25 points
Thermal Diffusivity
93 mm2/s
Thermal Shock Resistance
4.0 to 7.6 points
Alloy Composition
Among wrought aluminum alloys, the composition of 1100A aluminum is notable for containing comparatively high amounts of silicon (Si) and iron (Fe). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy. Most of the time, iron is an impurity in aluminum alloys. However, it may be added in quantity to improve strength (particularly at high temperatures) without much impact on electrical properties.
| Al | 99 to 100 | |
| Si | 0 to 1.0 | |
| Fe | 0 to 1.0 | |
| Cu | 0.050 to 0.2 | |
| Ti | 0 to 0.1 | |
| Zn | 0 to 0.1 | |
| Mg | 0 to 0.1 | |
| Mn | 0 to 0.050 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002
ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015