Aluminum 7039-T61

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Aluminum 7039-T61
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 A97039; Aluminium 7039-T61; AA7039-T61; Al7039-T61
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Physical Properties	Original Value	Comments

Density	2.74 g/cc	AA; Typical

Mechanical Properties	Original Value	Comments
Hardness, Brinell	123	500 kg load with 10 mm ball
	123 @Load 1500 kg
Hardness, Knoop	154	Converted from Brinell Hardness Value
Hardness, Rockwell A	47.6	Converted from Brinell Hardness Value
Hardness, Rockwell B	76	Converted from Brinell Hardness Value
Hardness, Vickers	140	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	400 MPa
	400 MPa	Longitudinal
	400 MPa	Transverse
Tensile Strength, Yield	330 MPa
	330 MPa	Longitudinal; 0.2%
	330 MPa	Transverse; 0.2%
Elongation at Break	14 %	Longitudinal
	14 %	Transverse
	13 % @Thickness 1.60 mm	In 5 cm
Modulus of Elasticity	69.6 GPa	Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Compressive Yield Strength	380 MPa	Longitudinal; 0.2%
	390 MPa	0.1% Permanent Set
	407 MPa	Transverse; 0.2%
Bearing Yield Strength	827 MPa	Transverse; Ultimate
Poissons Ratio	0.33	Estimated from trends in similar Al alloys.
Fatigue Strength	160 MPa @# of Cycles 5.00e+8
	164 MPa @# of Cycles 6.00e+8
	165 MPa @# of Cycles 1.00e+8
	170 MPa @# of Cycles 9.00e+6
	180 MPa @# of Cycles 600000
	210 MPa @# of Cycles 200000
	310 MPa @# of Cycles 30000
Shear Modulus	26.0 GPa	Estimated from similar Al alloys.
Shear Strength	235 MPa
	235 MPa	Transverse

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000450 ohm-cm	Estimated from trends in similar Al alloys.

Thermal Properties	Original Value	Comments
CTE, linear	23.4 µm/m-°C @Temperature 20.0 - 100 °C
	25.2 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.880 J/g-°C	Estimated from trends in similar Al alloys.
Thermal Conductivity	140 W/m-K
Melting Point	482 - 638 °C
Solidus	482 °C
Liquidus	638 °C

Processing Properties	Original Value	Comments
Annealing Temperature	670 - 700 °F
Solution Temperature	860 - 930 °F	soak 2 hr, quench in cold water; sheet stock should be quenched from 910 to 930°F, while extruded stock should be quenched from 860 to 880°F
Aging Temperature	250 °F	hold at temperature for 20 to 24 hr, air cool

Component Elements Properties	Original Value	Comments
Aluminum, Al	90.5 - 94 %	As remainder
Chromium, Cr	0.15 - 0.25 %
Copper, Cu	<= 0.10 %
Iron, Fe	<= 0.40 %
Magnesium, Mg	2.3 - 3.3 %
Manganese, Mn	0.10 - 0.40 %
Other, each	<= 0.05 %
Other, total	<= 0.15 %
Silicon, Si	<= 0.30 %
Titanium, Ti	<= 0.10 %
Zinc, Zn	3.5 - 4.5 %

References for this datasheet.

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MA7039T61 / 9565

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