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2017 (AlCu4MgSi, A92017) Aluminum

2017 aluminum is a 2000-series aluminum alloy: the main alloying addition is copper, and it is formulated for primary forming into wrought products. 2017 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-2017. AlCu4MgSi is the EN chemical designation. And A92017 is the UNS number.

It has been in use since 1916, but has only received its standard designation in 1954.

The properties of 2017 aluminum include six 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 2017 aluminum to: 2000-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

71 GPa 10 x 106 psi

Elongation at Break

12 to 18 %

Fatigue Strength

90 to 130 MPa 13 to 18 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Shear Strength

130 to 260 MPa 18 to 38 x 103 psi

Tensile Strength: Ultimate (UTS)

190 to 430 MPa 27 to 62 x 103 psi

Tensile Strength: Yield (Proof)

76 to 260 MPa 11 to 37 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

190 °C 380 °F

Melting Completion (Liquidus)

640 °C 1180 °F

Melting Onset (Solidus)

510 °C 950 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

150 W/m-K 86 BTU/h-ft-°F

Thermal Expansion

24 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

38 % IACS

Electrical Conductivity: Equal Weight (Specific)

110 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

3.0 g/cm3 190 lb/ft3

Embodied Carbon

8.0 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1140 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

24 to 66 MJ/m3

Resilience: Unit (Modulus of Resilience)

41 to 470 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

46 points

Strength to Weight: Axial

17 to 40 points

Strength to Weight: Bending

24 to 42 points

Thermal Diffusivity

56 mm2/s

Thermal Shock Resistance

7.9 to 18 points

Alloy Composition

Among wrought aluminum alloys, the composition of 2017 aluminum is notable for containing a comparatively high amount of copper (Cu). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.

Aluminum (Al)Al 91.6 to 95.5
Copper (Cu)Cu 3.5 to 4.5
Manganese (Mn)Mn 0.4 to 1.0
Magnesium (Mg)Mg 0.4 to 0.8
Silicon (Si)Si 0.2 to 0.8
Iron (Fe)Fe 0 to 0.7
Zinc (Zn)Zn 0 to 0.25
Titanium (Ti)Ti 0 to 0.15
Chromium (Cr)Cr 0 to 0.1
Residualsres. 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B211: Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire

Aerospace Materials, Brian Cantor et al. (editors), 2001

Aluminum Standards and Data, Aluminum Association Inc., 2013

ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993