7055 Aluminum alloy sheet profile

The 7055 alloy semi-finished products are used in the T77 state, which is used to make parts of the aircraft bearing structure in the near future. 7055 the super strength aluminum alloy is the alloy with the highest total strength at present, and the fracture toughness is better, and the fatigue crack propagation ability is strong. The microstructure of 7055 alloy has resistance to intergranular fracture and corrosion, and the microstructure of the alloy hinders the strong motion of dislocation.
7055 Aluminum alloy sheet profile is the most widely used aluminum alloy, which has the highest alloying degree and the highest strength. The LT tensile strength of 7055-T7751 pre stretched thick plate is above 660MPa, the corrosion level is EB, the tensile and compressive strength is 10% higher than that of 7150 T77, the corrosion resistance is between 7150 T6 and 7150 T77, and the fracture toughness is higher than that of the 7150 alloy with the same variety. 7055, T77, which is processed into T7751 thick plate and T77511 extruded parts, is applied to various occasions that require high compressive strength and good corrosion resistance, such as the upper wing structure, horizontal tail, joist beam, seat rail and freight slide.
The together use of 7055 and 7150 alloys has achieved good results in large military transport, Boeing 777, and the fourth generation of fighters.

Chemical Composition of 7050

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Ni

Zn

Ti

Zr

Others

Al

Each

Total

7055

0.10

0.15

2.0~2.6

0.05

1.8~2.3

0.04

~

7.6~8.4

0.06

0.05~0.25

0.05

0.15

Remainder

Alloy	Alloy Series	Main Features	σb  Value/MPa	Work Temperature/℃
7055	7050 series	The 7055 Aluminum alloy sheet profile is the 7 * * * * system aluminum alloy with the highest alloying degree at present. The main types are T7751 thick plate and T77511 extrusion parts. Compared with the 7150 alloy, it improves the tensile and compressive strength while maintaining some important properties, such as fracture toughness, corrosion resistance and so on.	643～669	<125

Physical Properties of 7050 Alloy
Alloy	Type	Temper	Size/mm	Direction	σb/MPa		σp 0.2/MPa
					A	B	A	B
7055	Aluminum sheet	T7751	δ12.7～38.1	L	614.1	627.9	593.4	607.2
				LT	614.1	627.9	586.5	600.3
	Aluminum profile	T74511	δ≤6.325	L	572.7	579.6	524.4	538.2
				LT	538.2	545.1	496.8	510.6
			δ6.35～12.675	L	579.6	586.5	531.3	545.1
				LT	545.1	552.0	503.7	517.5
			δ12.7~76.2	L	586.5	600.3	538.2	552.0
				LT	552.0	565.8	510.6	524.4
		T76511	δ≤6.325	L	614.1	627.9	586.5	600.3
				LT	572.7	586.5	545.1	558.9
			δ6.35～12.675	L	621.0	648.6	586.5	627.9
				LT	579.6	600.3	545.1	586.5
		T77511	δ12.7~38.1	L	648.6	655.5	621.0	641.7
				LT	607.2	621.0	579.6	607.2

Alloy	Temper	Aircraft models	Application parts and typical parts
7055	Aluminum sheet：  T7751 Aluminum profile： T74511、T76511、T77511	F-35，B777，ARJ21	All kinds of components, such as the upper wing structure, horizontal fin, joist beam, seat guide rail and freight slide, are required for high compressive strength and good corrosion resistance.