Alcoa 7055-T77511 Aluminum Extrusions

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Alcoa 7055-T77511 Aluminum Extrusions
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; 7000 Series Aluminum Alloy
Material Notes:	Alcoa introduced alloy 7055 in the -T7751 temper for plate and the -T77511 for extrusions in 1991. This alloy was developed for use in compression-dominated structures (such as upper wing structures, horizontal stabilizer, and keel beams) and provides advantages over alloy 7150 in compressive and tensile strengths while maintaining other important properties such as fracture toughness and corrosion resistance. Information provided by Alcoa.
Key Words:	Aluminium 7055-T77511; AA7055
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Physical Properties	Metric	English	Comments

Density	2.86 g/cc	0.103 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	634 MPa @Thickness 25.4 mm	92000 psi @Thickness 1.00 in	Longitudinal Direction
	641 MPa @Thickness 25.4 mm	93000 psi @Thickness 1.00 in	LT Direction
Tensile Strength, Yield	614 MPa @Thickness 25.4 mm	89000 psi @Thickness 1.00 in	Longitudinal Direction
	614 MPa @Thickness 25.4 mm	89000 psi @Thickness 1.00 in	LT Direction
Elongation at Break	10 % @Thickness 25.4 mm	10 % @Thickness 1.00 in	LT Direction
	11 % @Thickness 25.4 mm	11 % @Thickness 1.00 in	Longitudinal Direction
Compressive Yield Strength	621 MPa @Thickness 25.4 mm	90000 psi @Thickness 1.00 in	Longitudinal Direction
	648 MPa @Thickness 25.4 mm	94000 psi @Thickness 1.00 in	LT Direction
Fracture Toughness	26.4 MPa-m½ @Thickness 25.4 mm	24.0 ksi-in½ @Thickness 1.00 in	K_IC, T-L
	28.6 MPa-m½ @Thickness 25.4 mm	26.0 ksi-in½ @Thickness 1.00 in	K_IC, L-T

Component Elements Properties	Metric	English	Comments
Aluminum, Al	85.9 - 88.5 %	85.9 - 88.5 %	As remainder
Chromium, Cr	<= 0.04 %	<= 0.04 %
Copper, Cu	2.0 - 2.6 %	2.0 - 2.6 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Magnesium, Mg	1.8 - 2.3 %	1.8 - 2.3 %
Manganese, Mn	<= 0.05 %	<= 0.05 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	<= 0.10 %	<= 0.10 %
Titanium, Ti	<= 0.06 %	<= 0.06 %
Zinc, Zn	7.6 - 8.4 %	7.6 - 8.4 %
Zirconium, Zr	0.08 - 0.25 %	0.08 - 0.25 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NALCOA98 / 176072

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