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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.

Aluminum (Al) 99 to 100
Silicon (Si) 0 to 1.0
Iron (Fe) 0 to 1.0
Copper (Cu) 0.050 to 0.2
Titanium (Ti) 0 to 0.1
Zinc (Zn) 0 to 0.1
Magnesium (Mg) 0 to 0.1
Manganese (Mn) 0 to 0.050
Residuals 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