AA Standards Grade 7075 T73

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Description

A very high strength aerospace aluminium alloy. This alloy is used where high strength is required and where good resistance to general corrosion is NOT important. Strength depending upon temperature.

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Properties

General

Density

ρ

2.81 - 3.1 g/cm³ at 23 °C

Dimension

Dimensions

Dicke

Mechanical

Compressive modulus

Ecomp

72.4 MPa at 23 °C

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Elastic modulus

E

72 GPa at 23 °C

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Elongation

A

14 % at -195 °C

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Elongation in 50 mm

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Elongation A100

A100

1 - 9 % at 23 °C

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Elongation A50

A50

2 - 10 % at 23 °C

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Fatigue strength

SNf

159 MPa at 23 °C

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for 5x10⁸ cycles

Plane-Strain Fracture Toughnes

KIC

22 - 35 MPa·√m at 23 °C

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Typical for Wrought 7000 Series Aluminium

Poisson's ratio

ν

0.33 [-] at 23 °C

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Typical for Wrought 7000 Series Aluminium

Shear modulus

G

26.9 GPa at 23 °C

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Tensile strength

Rm

635 MPa at -195 °C

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up to 10000 h at temperature, at 35 MPa/min to yield strength and then at strain rate of 5%/min to fracture

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Yield strength

YS

420 MPa at 23 °C

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Yield strength Rp0.2

Rp0.2

496 MPa at -196 °C

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up to 10000 h at temperature, at 35 MPa/min to yield strength and then at strain rate of 5%/min to fracture

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Thermal

Coefficient of thermal expansion

α

2.3E-5 - 2.35E-5 1/K at 23 °C

Melting point

Tm

480 - 635 °C

Specific heat capacity

cp

910 J/(kg·K) at 23 °C

Thermal conductivity

λ

130 - 160 W/(m·K) at 23 °C

Electrical

Electrical conductivity

σel

2.30E+7 S/m at 23 °C

Typical/derived value

Electrical resistivity

ρel

4.31E-8 Ω·m at 23 °C

Typical value

Specific Electrical conductivity

40 % IACS

Typical value

Chemical properties

Element

Weight %

Comment

Al

86.9 - 91.4 %

Balance

Zn

5.1 - 6.1 %

Mg

2.1 - 2.9 %

Cu

1.2 - 2 %

Cr

0.18 - 0.28 %

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Technological properties

Application areas

Aerospace

Brazing

general: no brazing is known or developed

Corrosion properties

Stress corrosion cracking: Operational damage in areas with tensile stresses transverse to the grain structure, limited damage to laboratory samples, general: good, without protection in industrial or seawater atmosphere

General machinability

General: poor (O), good to acceptable

Workability

general (condition): not suitable

This material data has been provided by MakeItFrom.com,ASM Handbook Volume 2 Properties and Selection: Nonferrous Alloys and Special-Purpose Materials,WroughtAl_ElectricalResistivity,Righton Blackburns,AluKey.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.