Aluminum 7075-O

Subcategory: 7000 Series Aluminum Alloy; Aluminum Alloy; Metal; Nonferrous Metal

Close Analogs:

Composition Notes:
A Zr + Ti limit of 0.25 percent maximum may be used with this alloy designation for extruded and forged products only, but only when the supplier or producer and the purchaser have mutually so agreed. Agreement may be indicated, for example, by reference to a standard, by letter, by order note, or other means which allow the Zr + Ti limit.
Aluminum content reported is calculated as remainder.
Composition information provided by the Aluminum Association and is not for design.

Key Words: UNS A97075; ISO AlZn5.5MgCu(A); Aluminium 7075-O; AA7075-O

Component   Wt. %
Al87.1 - 91.4 
Cr0.18 - 0.28 
Cu1.2 - 2 
FeMax 0.5 
Component   Wt. %
Mg2.1 - 2.9 
MnMax 0.3 
Other, eachMax 0.05 
Other, totalMax 0.15 
Component   Wt. %
SiMax 0.4 
TiMax 0.2 
Zn5.1 - 6.1 

Material Notes:
General 7075 characteristics and uses (from Alcoa): Very high strength material used for highly stressed structural parts. The T7351 temper offers improved stress-corrosion cracking resistance.

Uses: Aircraft fittings, gears and shafts, fuse parts, meter shafts and gears, missile parts, regulating valve parts, worm gears, keys, aircraft, aerospace and defense applications.

Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN.

Physical PropertiesMetricEnglishComments
Density2.81 g/cc0.102 lb/in AA; Typical

Mechanical Properties
Hardness, Brinell6060 AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop8080 Converted from Brinell Hardness Value
Hardness, Vickers6868 Converted from Brinell Hardness Value
Ultimate Tensile Strength228 MPa33000 psi AA; Typical
Tensile Yield Strength103 MPa15000 psi AA; Typical
Elongation at Break16 %16 % AA; Typical; 1/2 in. (12.7 mm) Diameter
Elongation at Break17 %17 % AA; Typical; 1/16 in. (1.6 mm) Thickness
Modulus of Elasticity71.7 GPa10400 ksi AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poisson's Ratio0.330.33 
Shear Modulus26.9 GPa3900 ksi 
Shear Strength152 MPa22000 psi AA; Typical

Electrical Properties
Electrical Resistivity3.8e-006 ohm-cm3.8e-006 ohm-cm 

Thermal Properties
CTE, linear 68F23.6 m/m-C13.1 in/in-F AA; Typical; Average over 68-212F range.
CTE, linear 250C25.2 m/m-C14 in/in-F Average over the range 20-300C
Specific Heat Capacity0.96 J/g-C0.229 BTU/lb-F 
Thermal Conductivity173 W/m-K1200 BTU-in/hr-ft-F 
Melting Point477 - 635 C890 - 1175 F AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Homogenization may raise eutectic melting temperature 20-40F but usually does not eliminate eutectic melting.
Solidus477 C890 F AA; Typical
Liquidus635 C1175 F AA; Typical

Processing Properties
Annealing Temperature413 C775 F 
Solution Temperature466 - 482 C870 - 900 F 

References for this datasheet.

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