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Aluminium 7075

Specifications

Standard ALUMINIUM 7075-O
UNS  A 97075

Mechanical & Physical Properties

Density 2.81 g/cc
Melting Point 477 °C - 635 °C
Tensile Strength Psi-33000
MPa-228
Yield Strength (0.2%Offset) Psi-15000
MPa-103
Elongation 16

Chemical Composition

  Aluminum 7075
Al 87.1-91.4
Cr 0.18-0.28
Cu 1.2 - 2
Fe Max 0.5
Mg 2.1 -2.9
Mn Max 0.3
Zn 5.1-6.1
Si Max 0.4
Ti Max 0.2
Other, each Max 0.05
Other, total Max 0.15

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 Aluminium Association, Inc. and are NOT FOR DESIGN.

Physical Properties Metric English Comments
Density 2.81 g/cc 0.102 lb/in3  AA; Typical

Mechanical Properties
Hardness, Brinell 60 60  AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 80 80  Converted from Brinell Hardness Value
Hardness, Vickers 68 68  Converted from Brinell Hardness Value
Ultimate Tensile Strength 228 MPa 33000 psi  AA; Typical
Tensile Yield Strength 103 MPa 15000 psi  AA; Typical
Elongation at Break 16 % 16 %  AA; Typical; 1/2 in. (12.7 mm) Diameter
Elongation at Break 17 % 17 %  AA; Typical; 1/16 in. (1.6 mm) Thickness
Modulus of Elasticity 71.7 GPa 10400 ksi  AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poisson's Ratio 0.33 0.33  
Shear Modulus 26.9 GPa 3900 ksi  
Shear Strength 152 MPa 22000 psi  AA; Typical

Electrical Properties
Electrical Resistivity 3.8e-006 ohm-cm 3.8e-006 ohm-cm  

Thermal Properties
CTE, linear 68°F 23.6 µm/m-°C 13.1 µin/in-°F  AA; Typical; Average over 68-212°F range.
CTE, linear 250°C 25.2 µm/m-°C 14 µin/in-°F  Average over the range 20-300°C
Heat Capacity 0.96 J/g-°C 0.229 BTU/lb-°F  
Thermal Conductivity 173 W/m-K 1200 BTU-in/hr-ft2-°F  
Melting Point 477 - 635 °C 890 - 1175 °F  AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Homogenization may raise eutectic melting temperature 20-40°F but usually does not eliminate eutectic melting.
Solidus 477 °C 890 °F  AA; Typical
Liquidus 635 °C 1175 °F  AA; Typical

Processing Properties
Annealing Temperature 413 °C 775 °F  
Solution Temperature 466 - 482 °C 870 - 900 °F

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