Aluminum 7021-T62

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Aluminum 7021-T62
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 A97021; Aluminium 7021-T62; AA7021-T62; Al7021-T62
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Physical Properties	Original Value	Comments

Density	2.78 g/cc	AA; Typical

Mechanical Properties	Original Value	Comments
Hardness, Brinell	112	500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop	140	Converted from Brinell Hardness Value
Hardness, Rockwell A	44.8	Converted from Brinell Hardness Value
Hardness, Rockwell B	70	Converted from Brinell Hardness Value
Hardness, Vickers	127	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	420 MPa
Tensile Strength, Yield	380 MPa
Elongation at Break	13 % @Thickness 1.60 mm	In 5 cm
Modulus of Elasticity	72.0 GPa	Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus. Estimated from trends in similar Al alloys.
Poissons Ratio	0.33	Estimated from trends in similar Al alloys.
Fatigue Strength	140 MPa @# of Cycles 5.00e+8
Shear Modulus	27.0 GPa	Estimated from similar Al alloys.
Shear Strength	250 MPa	Calculated value.

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	23.6 µm/m-°C @Temperature 20.0 - 100 °C
	25.3 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	Estimated from trends in similar Al alloys.
Melting Point	<= 640 °C	Estimated from trends in similar Al alloys.
Liquidus	640 °C	Estimated from trends in similar Al alloys.

Component Elements Properties	Original Value	Comments
Aluminum, Al	90.7 - 93.7 %	As remainder
Chromium, Cr	<= 0.05 %
Copper, Cu	<= 0.25 %
Iron, Fe	<= 0.40 %
Magnesium, Mg	1.2 - 1.8 %
Manganese, Mn	<= 0.10 %
Other, each	<= 0.05 %
Other, total	<= 0.15 %
Silicon, Si	<= 0.25 %
Titanium, Ti	<= 0.10 %
Zinc, Zn	5.0 - 6.0 %
Zirconium, Zr	0.08 - 0.18 %

References for this datasheet.

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MA7021T62 / 9548

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