MakeItFrom.com
Menu (ESC)

7005 (AlZn4.5Mg1.5Mn, A97005) Aluminum

7005 aluminum is a 7000-series aluminum alloy: the main alloying addition is zinc and it is formulated for primary forming into wrought products. 7005 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-7005. A97005 is the UNS number. Additionally, the EN chemical designation is AlZn4,5Mg1,5Mn.

It has been in use since 1960, but has only received its standard designation in 1962.

It can have the highest ductility and the highest thermal conductivity among 7000-series alloys.

The properties of 7005 aluminum include four 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 7005 aluminum to: 7000-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

70 GPa 10 x 106 psi

Elongation at Break

10 to 20 %

Fatigue Strength

100 to 190 MPa 15 to 28 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

120 to 230 MPa 17 to 34 x 103 psi

Tensile Strength: Ultimate (UTS)

200 to 400 MPa 28 to 57 x 103 psi

Tensile Strength: Yield (Proof)

95 to 350 MPa 14 to 50 x 103 psi

Thermal Properties

Latent Heat of Fusion

380 J/g

Maximum Temperature: Mechanical

200 °C 400 °F

Melting Completion (Liquidus)

640 °C 1190 °F

Melting Onset (Solidus)

610 °C 1120 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

140 to 170 W/m-K 79 to 96 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

35 to 43 % IACS

Electrical Conductivity: Equal Weight (Specific)

110 to 130 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Calomel Potential

-850 mV

Density

2.9 g/cm3 180 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

150 MJ/kg 65 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

32 to 57 MJ/m3

Resilience: Unit (Modulus of Resilience)

65 to 850 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

47 points

Strength to Weight: Axial

19 to 38 points

Strength to Weight: Bending

26 to 41 points

Thermal Diffusivity

54 to 65 m2/s

Thermal Shock Resistance

8.7 to 18 points

Alloy Composition

Among wrought aluminum alloys, the composition of 7005 aluminum is notable for containing a comparatively high amount of zinc (Zn) and including zirconium (Zr). Zinc is used to achieve significant increases in strength, at the cost of increased susceptibility to stress corrosion cracking. Among other things, this limits weldability. Zirconium is used to increase an alloy's recrystallization temperature, which increases the temperature at which the alloy can be used without permanent loss of mechanical properties.

Aluminum (Al) 91 to 94.7
Zinc (Zn) 4.0 to 5.0
Magnesium (Mg) 1.0 to 1.8
Manganese (Mn) 0.2 to 0.7
Iron (Fe) 0 to 0.4
Silicon (Si) 0 to 0.35
Zirconium (Zr) 0.080 to 0.2
Chromium (Cr) 0.060 to 0.2
Copper (Cu) 0 to 0.1
Titanium (Ti) 0.010 to 0.060
Residuals 0 to 0.15

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

Followup Questions

Similar Alloys

Further Reading

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties

Aluminum Standards and Data, Aluminum Association Inc., 2013

EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products

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