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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 PropertiesMetricEnglishComments
Density 2.81 g/cc0.102 lb/in³AA; Typical
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 140140500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 177177Converted from Brinell Hardness Value
Hardness, Rockwell A 51.651.6Converted from Brinell Hardness Value
Hardness, Rockwell B 8484Converted from Brinell Hardness Value
Hardness, Vickers 162162Converted from Brinell Hardness Value
Tensile Strength, Ultimate 517 MPa75000 psiAA; Typical
 524 MPa
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
76000 psi
@Thickness 0.0394 - 0.250 in,
Temperature 75.2 °F
 552 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
80100 psi
@Thickness 0.0394 - 0.250 in,
Temperature -18.4 °F
 579 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
84000 psi
@Thickness 0.0394 - 0.250 in,
Temperature -112 °F
 655 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
95000 psi
@Thickness 0.0394 - 0.250 in,
Temperature -321 °F
Tensile Strength, Yield 448 MPa65000 psiAA; Typical
 462 MPa
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
67000 psi
@Thickness 0.0394 - 0.250 in,
Temperature 75.2 °F
 483 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
70100 psi
@Thickness 0.0394 - 0.250 in,
Temperature -18.4 °F
 503 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
73000 psi
@Thickness 0.0394 - 0.250 in,
Temperature -112 °F
 565 MPa
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
81900 psi
@Thickness 0.0394 - 0.250 in,
Temperature -321 °F
Elongation at Break 12 %
@Thickness 1.59 mm
12 %
@Thickness 0.0625 in
AA; Typical
 11 %
@Thickness 1.00 - 6.35 mm,
Temperature -196 °C
11 %
@Thickness 0.0394 - 0.250 in,
Temperature -321 °F
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature -80.0 °C
12 %
@Thickness 0.0394 - 0.250 in,
Temperature -112 °F
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature -28.0 °C
12 %
@Thickness 0.0394 - 0.250 in,
Temperature -18.4 °F
 12 %
@Thickness 1.00 - 6.35 mm,
Temperature 24.0 °C
12 %
@Thickness 0.0394 - 0.250 in,
Temperature 75.2 °F
Modulus of Elasticity 70.3 GPa10200 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio 0.330.33
Fracture Toughness  87.0 MPa-m½
@Thickness 1.40 mm,
Temperature -54.0 °C
79.2 ksi-in½
@Thickness 0.0551 in,
Temperature -65.2 °F
sheet; T-L
 90.0 MPa-m½
@Thickness 1.20 mm,
Temperature -54.0 °C
81.9 ksi-in½
@Thickness 0.0472 in,
Temperature -65.2 °F
sheet; T-L
 102 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C
92.8 ksi-in½
@Thickness 0.0630 in,
Temperature -65.2 °F
sheet; T-L
 109 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C
99.2 ksi-in½
@Thickness 0.0630 in,
Temperature -65.2 °F
sheet; T-L
 111 MPa-m½
@Thickness 1.60 mm,
Temperature -54.0 °C
101 ksi-in½
@Thickness 0.0630 in,
Temperature -65.2 °F
sheet; T-L
 122 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C
111 ksi-in½
@Thickness 0.0630 in,
Temperature 71.6 °F
sheet; T-L
 125 MPa-m½
@Thickness 1.80 mm,
Temperature -54.0 °C
114 ksi-in½
@Thickness 0.0709 in,
Temperature -65.2 °F
sheet; T-L
 136 MPa-m½
@Thickness 1.40 mm,
Temperature 22.0 °C
124 ksi-in½
@Thickness 0.0551 in,
Temperature 71.6 °F
sheet; T-L
 143 MPa-m½
@Thickness 1.20 mm,
Temperature 22.0 °C
130 ksi-in½
@Thickness 0.0472 in,
Temperature 71.6 °F
sheet; T-L
 147 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C
134 ksi-in½
@Thickness 0.0630 in,
Temperature 71.6 °F
sheet; T-L
 149 MPa-m½
@Thickness 1.80 mm,
Temperature 22.0 °C
136 ksi-in½
@Thickness 0.0709 in,
Temperature 71.6 °F
sheet; T-L
 150 MPa-m½
@Thickness 1.60 mm,
Temperature 22.0 °C
137 ksi-in½
@Thickness 0.0630 in,
Temperature 71.6 °F
sheet; T-L
Shear Modulus 27.0 GPa3920 ksi
Shear Strength 310 MPa45000 psiCalculated value.
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000432 ohm-cm
@Temperature 20.0 °C
0.00000432 ohm-cm
@Temperature 68.0 °F
AA; Typical
 
Thermal PropertiesMetricEnglishComments
CTE, linear  21.6 µm/m-°C
@Temperature -50.0 - 20.0 °C
12.0 µin/in-°F
@Temperature -58.0 - 68.0 °F
 23.2 µm/m-°C
@Temperature 20.0 - 100 °C
12.9 µin/in-°F
@Temperature 68.0 - 212 °F
AA; Typical; average over range
 23.4 µm/m-°C
@Temperature 20.0 - 100 °C
13.0 µin/in-°F
@Temperature 68.0 - 212 °F
 24.3 µm/m-°C
@Temperature 20.0 - 200 °C
13.5 µin/in-°F
@Temperature 68.0 - 392 °F
 25.2 µm/m-°C
@Temperature 20.0 - 300 °C
14.0 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.880 J/g-°C0.210 BTU/lb-°FEstimated from trends in similar Al alloys.
Thermal Conductivity 147 W/m-K1020 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 477 - 635.0 °C890 - 1175 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus 477 °C890 °FAA; Typical
Liquidus 635.0 °C1175 °FAA; Typical
 
Processing PropertiesMetricEnglishComments
Annealing Temperature 413 °C775 °F
Solution Temperature 516 °C960 °Fmust be preceded by soak at 870 to 890°F
Aging Temperature 121 - 177 °C250 - 350 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 88.5 - 91.5 %88.5 - 91.5 %As remainder
Chromium, Cr 0.18 - 0.25 %0.18 - 0.25 %
Copper, Cu 1.2 - 1.9 %1.2 - 1.9 %
Iron, Fe <= 0.12 %<= 0.12 %
Magnesium, Mg 1.9 - 2.6 %1.9 - 2.6 %
Manganese, Mn <= 0.06 %<= 0.06 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si <= 0.10 %<= 0.10 %
Titanium, Ti <= 0.06 %<= 0.06 %
Zinc, Zn 5.2 - 6.2 %5.2 - 6.2 %

References for this datasheet.

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