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	Metric	English	Comments

Density	2.74 g/cc	0.0990 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	123	123	500 kg load with 10 mm ball
	123 @Load 1500 kg	123 @Load 3310 lb
Hardness, Knoop	154	154	Converted from Brinell Hardness Value
Hardness, Rockwell A	47.6	47.6	Converted from Brinell Hardness Value
Hardness, Rockwell B	76	76	Converted from Brinell Hardness Value
Hardness, Vickers	140	140	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	400 MPa	58000 psi
	400 MPa	58000 psi	Longitudinal
	400 MPa	58000 psi	Transverse
Tensile Strength, Yield	330 MPa	47900 psi
	330 MPa	47900 psi	Longitudinal; 0.2%
	330 MPa	47900 psi	Transverse; 0.2%
Elongation at Break	14 %	14 %	Longitudinal
	14 %	14 %	Transverse
	13 % @Thickness 1.60 mm	13 % @Thickness 0.0630 in	In 5 cm
Modulus of Elasticity	69.6 GPa	10100 ksi	Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Compressive Yield Strength	380 MPa	55100 psi	Longitudinal; 0.2%
	390 MPa	56600 psi	0.1% Permanent Set
	407 MPa	59000 psi	Transverse; 0.2%
Bearing Yield Strength	827 MPa	120000 psi	Transverse; Ultimate
Poissons Ratio	0.33	0.33	Estimated from trends in similar Al alloys.
Fatigue Strength	160 MPa @# of Cycles 5.00e+8	23200 psi @# of Cycles 5.00e+8
	164 MPa @# of Cycles 6.00e+8	23800 psi @# of Cycles 6.00e+8
	165 MPa @# of Cycles 1.00e+8	23900 psi @# of Cycles 1.00e+8
	170 MPa @# of Cycles 9.00e+6	24700 psi @# of Cycles 9.00e+6
	180 MPa @# of Cycles 600000	26100 psi @# of Cycles 600000
	210 MPa @# of Cycles 200000	30500 psi @# of Cycles 200000
	310 MPa @# of Cycles 30000	45000 psi @# of Cycles 30000
Shear Modulus	26.0 GPa	3770 ksi	Estimated from similar Al alloys.
Shear Strength	235 MPa	34100 psi
	235 MPa	34100 psi	Transverse

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

Thermal Properties	Metric	English	Comments
CTE, linear	23.4 µm/m-°C @Temperature 20.0 - 100 °C	13.0 µin/in-°F @Temperature 68.0 - 212 °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-°C	0.210 BTU/lb-°F	Estimated from trends in similar Al alloys.
Thermal Conductivity	140 W/m-K	972 BTU-in/hr-ft²-°F
Melting Point	482 - 638 °C	900 - 1180 °F
Solidus	482 °C	900 °F
Liquidus	638 °C	1180 °F

Processing Properties	Metric	English	Comments
Annealing Temperature	354 - 371 °C	670 - 700 °F
Solution Temperature	460 - 499 °C	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	121 °C	250 °F	hold at temperature for 20 to 24 hr, air cool

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

References for this datasheet.

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MA7039T61 / 9565

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