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Elmet Technologies

Aluminum 7075-T73; 7075-T735x
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 7000 Series Aluminum Alloy
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 Aluminum Association, Inc. and are NOT FOR DESIGN.

Composition Notes:
A Zr + Ti limit of 0.25 percent maximum may be used with this alloy designation for extruded and forged products only, but only when the supplier and the purchaser have mutually agreed.
Composition information provided by the Aluminum Association and is not for design.
Key Words: AA7075-T73; AA7075-T735, UNS A97075; ISO AlZn5.5MgCu; Aluminium 7075-T73; Aluminium 7075-T735x; Al7075-T73
Vendors: Click here to view all available suppliers for this material.

Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 2.81 g/cc0.102 lb/in³AA; Typical
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 135135500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 120120Converted from Brinell Hardness Value
Hardness, Rockwell A 50.550.5Converted from Brinell Hardness Value
Hardness, Rockwell B 8282Converted from Brinell Hardness Value
Hardness, Vickers 155155Converted from Brinell Hardness Value
Tensile Strength, Ultimate >= 462 MPa>= 67000 psiSheet
 505 MPa73200 psi
 41.0 MPa
@Temperature 371 °C		5950 psi
@Temperature 700 °F
 55.0 MPa
@Temperature 316 °C		7980 psi
@Temperature 601 °F
 76.0 MPa
@Temperature 260 °C		11000 psi
@Temperature 500 °F
 110 MPa
@Temperature 204 °C		16000 psi
@Temperature 399 °F
 214 MPa
@Temperature 149 °C		31000 psi
@Temperature 300 °F
 434 MPa
@Temperature 100 °C		62900 psi
@Temperature 212 °F
 503 MPa
@Temperature 24.0 °C		73000 psi
@Temperature 75.2 °F
 524 MPa
@Temperature -28.0 °C		76000 psi
@Temperature -18.4 °F
 545 MPa
@Temperature -80.0 °C		79000 psi
@Temperature -112 °F
 634 MPa
@Temperature -196 °C		92000 psi
@Temperature -321 °F
 >= 441 MPa
@Thickness 63.53 - 76.2 mm		>= 64000 psi
@Thickness 2.501 - 3.00 in		Plate; T7351
 >= 455 MPa
@Thickness 50.83 - 63.5 mm		>= 66000 psi
@Thickness 2.001 - 2.50 in		Plate; T7351
 >= 476 MPa
@Thickness 6.35 - 50.8 mm		>= 69000 psi
@Thickness 0.250 - 2.00 in		Plate; T7351
Tensile Strength, Yield >= 386 MPa>= 56000 psiSheet
 435 MPa63100 psi
 >= 338 MPa
@Thickness 63.53 - 76.2 mm		>= 49000 psi
@Thickness 2.501 - 3.00 in		Plate; T7351
 >= 359 MPa
@Thickness 50.83 - 63.5 mm		>= 52100 psi
@Thickness 2.001 - 2.50 in		Plate; T7351
 >= 393 MPa
@Thickness 6.35 - 50.8 mm		>= 57000 psi
@Thickness 0.250 - 2.00 in		Plate; T7351
 32.0 MPa
@Strain 0.2 %,
Temperature 271 °C		4640 psi
@Strain 0.2 %,
Temperature 520 °F
 45.0 MPa
@Strain 0.2 %,
Temperature 316 °C		6530 psi
@Strain 0.2 %,
Temperature 601 °F
 62.0 MPa
@Strain 0.2 %,
Temperature 260 °C		8990 psi
@Strain 0.2 %,
Temperature 500 °F
 90.0 MPa
@Strain 0.2 %,
Temperature 204 °C		13100 psi
@Strain 0.2 %,
Temperature 399 °F
 186 MPa
@Strain 0.2 %,
Temperature 149 °C		27000 psi
@Strain 0.2 %,
Temperature 300 °F
 400 MPa
@Strain 0.2 %,
Temperature 100 °C		58000 psi
@Strain 0.2 %,
Temperature 212 °F
 434 MPa
@Strain 0.2 %,
Temperature 24.0 °C		62900 psi
@Strain 0.2 %,
Temperature 75.2 °F
 448 MPa
@Strain 0.2 %,
Temperature -28.0 °C		65000 psi
@Strain 0.2 %,
Temperature -18.4 °F
 462 MPa
@Strain 0.2 %,
Temperature -80.0 °C		67000 psi
@Strain 0.2 %,
Temperature -112 °F
 496 MPa
@Strain 0.2 %,
Temperature -196 °C		71900 psi
@Strain 0.2 %,
Temperature -321 °F
Elongation at Break >= 8.0 %>= 8.0 %Sheet
 13 %
@Temperature -28.0 °C		13 %
@Temperature -18.4 °F
 13 %
@Temperature 24.0 °C		13 %
@Temperature 75.2 °F
 14 %
@Temperature -196 °C		14 %
@Temperature -321 °F
 14 %
@Temperature -80.0 °C		14 %
@Temperature -112 °F
 15 %
@Temperature 100 °C		15 %
@Temperature 212 °F
 30 %
@Temperature 149 °C		30 %
@Temperature 300 °F
 55 %
@Temperature 204 °C		55 %
@Temperature 399 °F
 65 %
@Temperature 260 °C		65 %
@Temperature 500 °F
 70 %
@Temperature 316 °C		70 %
@Temperature 601 °F
 70 %
@Temperature 371 °C		70 %
@Temperature 700 °F
 >= 6.0 %
@Thickness 50.83 - 63.5 mm		>= 6.0 %
@Thickness 2.001 - 2.50 in		Plate; T7351
 >= 6.0 %
@Thickness 63.53 - 76.2 mm		>= 6.0 %
@Thickness 2.501 - 3.00 in		Plate; T7351
 6.0 - 7.0 %
@Thickness 6.35 - 50.8 mm		6.0 - 7.0 %
@Thickness 0.250 - 2.00 in		Plate; T7351
 13 %
@Thickness 1.60 mm		13 %
@Thickness 0.0630 in		In 5 cm
Modulus of Elasticity 72.0 GPa10400 ksiAverage of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poissons Ratio 0.330.33
Fatigue Strength 150 MPa
@# of Cycles 5.00e+8 		21800 psi
@# of Cycles 5.00e+8
Fracture Toughness 20.0 MPa-m½18.2 ksi-in½Plate. K(IC) in SL direction
 20.0 MPa-m½18.2 ksi-in½Plate. K(IC) in T-L direction
 22.0 MPa-m½20.0 ksi-in½T7351; Plate; S-L; average
 20.9 - 23.1 MPa-m½19.0 - 21.0 ksi-in½T7351; Plate; S-L
 23.1 MPa-m½21.0 ksi-in½T7352; Forgings; S-L; average
 20.9 - 27.5 MPa-m½19.0 - 25.0 ksi-in½T7352; Forgings; S-L
 25.3 - 28.6 MPa-m½23.0 - 26.0 ksi-in½T7352; Forgings; T-L
 27.5 MPa-m½25.0 ksi-in½T7352; Forgings; T-L; average
 27.5 - 36.3 MPa-m½25.0 - 33.0 ksi-in½T7351; Plate; T-L
 31.9 MPa-m½29.0 ksi-in½T7351; Plate; T-L; average
 32.0 MPa-m½29.1 ksi-in½Plate. K(IC) in L-T Direction
 33.0 MPa-m½30.0 ksi-in½T7351; Plate; L-T
 34.1 MPa-m½31.0 ksi-in½T7352; Forgings; L-T; average
 29.7 - 38.5 MPa-m½27.0 - 35.0 ksi-in½T7352; Forgings; L-T
Machinability 70 %70 %0-100 Scale of Aluminum Alloys
Shear Modulus 26.9 GPa3900 ksi
Shear Strength 300 MPa43500 psiCalculated value.
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000430 ohm-cm0.00000430 ohm-cm
 
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
 23.4 µm/m-°C
@Temperature 20.0 - 100 °C		13.0 µin/in-°F
@Temperature 68.0 - 212 °F
 23.6 µm/m-°C
@Temperature 20.0 - 100 °C		13.1 µin/in-°F
@Temperature 68.0 - 212 °F		AA; Typical; average over range
 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 0.960 J/g-°C0.229 BTU/lb-°F
Thermal Conductivity 155 W/m-K1080 BTU-in/hr-ft²-°F
Melting Point 477 - 635.0 °C890 - 1175 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Homogenization may raise eutectic melting temperature 20-40°F but usually does not eliminate it.
Solidus 477 °C890 °FAA; Typical
Liquidus 635.0 °C1175 °FAA; Typical
 
Processing PropertiesMetricEnglishComments
Annealing Temperature 413 °C775 °F
Solution Temperature 466 - 482 °C870 - 900 °F
Aging Temperature 107 °C225 °Ftwo stage treatment - second stage 325 to 350°F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 87.1 - 91.4 %87.1 - 91.4 %As remainder
Chromium, Cr 0.18 - 0.28 %0.18 - 0.28 %
Copper, Cu 1.2 - 2.0 %1.2 - 2.0 %
Iron, Fe <= 0.50 %<= 0.50 %
Magnesium, Mg 2.1 - 2.9 %2.1 - 2.9 %
Manganese, Mn <= 0.30 %<= 0.30 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si <= 0.40 %<= 0.40 %
Titanium, Ti <= 0.20 %<= 0.20 %
Zinc, Zn 5.1 - 6.1 %5.1 - 6.1 %

References for this datasheet.

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