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Aluminum 7050-T7451 (7050-T73651)
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 7000 Series Aluminum Alloy

Material Notes: 7050 has very high strength coupled with high resistance to exfoliation corrosion and stress-corrosion cracking, high fracture toughness, and fatigue resistance. This leads to applications in aircraft structures.

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

Composition Notes:
Composition information provided by the Aluminum Association and is not for design.

Key Words: AA7050-T7451; AA7070-T73651, UNS A97050; ISO AlZn6CuMgZr; Aluminium 7050-T7451; Aluminium 7070-T73651; Al7050-T7451
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Physical PropertiesOriginal ValueComments
Density 2.83 g/ccAA; Typical
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 140500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 177Converted from Brinell Hardness Value
Hardness, Rockwell A 51.6Converted from Brinell Hardness Value
Hardness, Rockwell B 84Converted from Brinell Hardness Value
Hardness, Vickers 162Converted from Brinell Hardness Value
Tensile Strength, Ultimate 76.0 ksiAA; Typical
Tensile Strength, Yield 68.0 ksiAA; Typical
Elongation at Break 11 %
@Diameter 12.7 mm
AA; Typical
Modulus of Elasticity 10400 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio 0.33
Fracture Toughness >= 22.0 MPa-m½S-L
 >= 24.2 MPa-m½T-L
 >= 26.4 MPa-m½L-T
 28.0 MPa-m½K(IC) in S-L Direction
 28.6 MPa-m½average; S-L
 29.7 MPa-m½average; T-L
 31.0 MPa-m½K(IC) in T-L Direction
 35.0 MPa-m½K(IC) in L-T Direction
 35.2 MPa-m½average; L-T
Shear Modulus 26.9 GPa
Shear Strength 44.0 ksiAA; Typical
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00000430 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 12.8 µin/in-°F
@Temperature 20.0 - 100 °C
AA; Typical; average over range
 21.7 µm/m-°C
@Temperature -50.0 - 20.0 °C
 23.5 µm/m-°C
@Temperature 20.0 - 100 °C
 24.4 µm/m-°C
@Temperature 20.0 - 200 °C
 25.4 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.860 J/g-°C
Thermal Conductivity 157 W/m-K
Melting Point 910 - 1165 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus 910 °FAA; Typical
Liquidus 1165 °FAA; Typical
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 775 °F
Solution Temperature 890 °F
Aging Temperature 250 - 350 °F
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 87.3 - 90.3 %As remainder
Chromium, Cr <= 0.04 %
Copper, Cu 2.0 - 2.6 %
Iron, Fe <= 0.15 %
Magnesium, Mg 1.9 - 2.6 %
Manganese, Mn <= 0.10 %
Other, each <= 0.05 %
Other, total <= 0.15 %
Silicon, Si <= 0.12 %
Titanium, Ti <= 0.06 %
Zinc, Zn 5.7 - 6.7 %
Zirconium, Zr 0.08 - 0.15 %

References for this datasheet.

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MA7050T745 / 9577

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