Aluminum 7039-O

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Aluminum 7039-O
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-O; AA7039-O; Al7039-O
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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	61	61	500 kg load with 10 mm ball
	61 @Load 1500 kg	61 @Load 3310 lb
Hardness, Knoop	82	82	Converted from Brinell Hardness Value
Hardness, Vickers	69	69	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	227 MPa	32900 psi	Longitudinal
	227 MPa	32900 psi	Transverse
	230 MPa	33400 psi
Tensile Strength, Yield	100 MPa	14500 psi
	103 MPa	14900 psi	Longitudinal; 0.2%
	103 MPa	14900 psi	Transverse; 0.2%
Elongation at Break	22 %	22 %	Longitudinal
	22 %	22 %	Transverse
	22 % @Thickness 1.60 mm	22 % @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
Poissons Ratio	0.33	0.33	Estimated from trends in similar Al alloys.
Shear Modulus	26.0 GPa	3770 ksi	Estimated from similar Al alloys.
Shear Strength	140 MPa	20300 psi	Calculated value.

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
	413 - 454 °C	775 - 850 °F	soak for 2-3 hr, air cool, reheat at 450°F, hold at temperature for 4 hr, air cool; or heat to 670 to 700°F, air cool
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

Component Elements Properties	Metric	English	Comments
Aluminum, Al	90.5 - 90.5 %	90.5 - 90.5 %	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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Overview of materials for 7000 Series Aluminum Alloy

MA7039O / 9564

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