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Aluminum 7475-T761
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 7000 Series Aluminum Alloy
Material Notes: 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: UNS A97475; ISO AlZn5.5MgCu(A); Aluminium 7475-T761; AA7475-T761; Al7475-T761
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Physical PropertiesOriginal ValueComments
Density 2.81 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 75.0 ksiAA; Typical
 524 MPa
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
 552 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
 579 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
 655 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
Tensile Strength, Yield 65.0 ksiAA; Typical
 462 MPa
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
 483 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
 503 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
 565 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
Elongation at Break 12 %
@Thickness 1.59 mm		AA; Typical
 11 %
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
Modulus of Elasticity 10200 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio 0.33
Fracture Toughness 87.0 MPa-m½
@Thickness 1.40 mm,
Temperature -54.0 °C		sheet; T-L
 90.0 MPa-m½
@Thickness 1.20 mm,
Temperature -54.0 °C		sheet; T-L
 102 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C		sheet; T-L
 109 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C		sheet; T-L
 111 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C		sheet; T-L
 122 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C		sheet; T-L
 125 MPa-m½
@Thickness 1.80 mm,
Temperature -54.0 °C		sheet; T-L
 136 MPa-m½
@Thickness 1.40 mm,
Temperature 22.0 °C		sheet; T-L
 143 MPa-m½
@Thickness 1.20 mm,
Temperature 22.0 °C		sheet; T-L
 147 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C		sheet; T-L
 149 MPa-m½
@Thickness 1.80 mm,
Temperature 22.0 °C		sheet; T-L
 150 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C		sheet; T-L
Shear Modulus 27.0 GPa
Shear Strength 310 MPaCalculated value.
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 26.0 ohm-cir-mil/ft
@Temperature 20.0 °C		AA; Typical
 
Thermal PropertiesOriginal ValueComments
CTE, linear 12.9 µin/in-°F
@Temperature 20.0 - 100 °C		AA; Typical; average over range
 21.6 µm/m-°C
@Temperature -50.0 - 20.0 °C
 23.4 µm/m-°C
@Temperature 20.0 - 100 °C
 24.3 µm/m-°C
@Temperature 20.0 - 200 °C
 25.2 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.880 J/g-°CEstimated from trends in similar Al alloys.
Thermal Conductivity 1020 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 890 - 1175 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus 890 °FAA; Typical
Liquidus 1175 °FAA; Typical
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 775 °F
Solution Temperature 960 °Fmust be preceded by soak at 870 to 890°F
Aging Temperature 250 - 350 °F
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 88.5 - 91.5 %As remainder
Chromium, Cr 0.18 - 0.25 %
Copper, Cu 1.2 - 1.9 %
Iron, Fe <= 0.12 %
Magnesium, Mg 1.9 - 2.6 %
Manganese, Mn <= 0.06 %
Other, each <= 0.05 %
Other, total <= 0.15 %
Silicon, Si <= 0.10 %
Titanium, Ti <= 0.06 %
Zinc, Zn 5.2 - 6.2 %

References for this datasheet.

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