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Alcoa 7055-T77511 Aluminum Extrusions

Category	Metal , Nonferrous Metal , Aluminum Alloy , 7000 Series Aluminum Alloy
Manufacturer	Alcoa
Trade Name
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Alcoa 7055-T77511 Aluminum Extrusions.pdf
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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.

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<sub>IC</sub>, T-L
	28.6 MPa-m½ @Thickness 25.4 mm	26.0 ksi-in½ @Thickness 1.00 in	K<sub>IC</sub>, 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 %

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