7A04 T6 Aircraft Aerospace Aviation Aluminum Alloy Sheet Plate Forgings

Product Description

7A04 T6 Aircraft Aerospace Aviation Aluminum Alloy Sheet Plate Forgings

7A04 aluminum alloy sheet plate profile forgings is a heat treatment and strengthening alloy of Al-Zn-Mg-Cu system. Its strength is higher than that of hard aluminum. It is characterized by its yield strength close to tensile strength and plasticity, and its sensitivity to stress concentration is strong, especially when subjected to vibration load and repeated static load. Therefore, the design of parts, the manufacturing process and the assembly process need to strictly avoid the stress concentration and the formation of additional stress. The heat resistance of the alloy is poor, and it will soften rapidly when the temperature is higher than 125, and the stress corrosion resistance of thick and thick parts is poor in short and transverse.

The main stress parts of 7A04 alloy aluminum alloy sheet plate profile forgings is widely used in aircraft structures, such as beams and stringers, bulkheads, ribs, skin, joints, undercarriage parts etc.. It can produce all kinds of semi-finished products, such as plate, strip, section, bar, wall, pipe, wire, free forgings and die forgings.

Chemical composition of 7A04 alloy

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Ni

Zn

Ti

Zr

Others

Al

Each

Total

7A04

0.50

0.50

1.4~2.0

0.20~0.60

1.8~2.8

0.15~0.25

-

5.0~7.0

-

-

0.05

0.15

Remainder

 

Alloy	Alloy series	Mean features	σb  Value/MPa	Working temperature/ºC
7A04	B95(Russia)	The yield strength to tensile strength, low ductility, sensitivity to stress concentration effects, especially the repeated static load under vibration load and the situation is more obvious, therefore need to strictly avoid stress concentration factor and the formation of additional stress in parts of the design, manufacture and assembly process. The short transverse stress corrosion resistance of the thick and large parts of the alloy is poor. There are mainly plate and extrusion parts.	480~570	<125

Physical Property of 7A04 Aluminum alloy sheet plate profile forgings
Alloy	Type	Temper	δ size/mm	Direction	σb/MPa	σp 0.2/MPa		δ %	Standard
7A04	Aluminum Plate	T6	1.0~2.5	LT	480		410	7	GJB 2053-1994
			>2.5	LT	490		420	7
		T9	2.0~4.0	LT	520		450	7
		T6	7.0~10.0	L	490		410	6	GJB 2662-1996
			>10~25	L	490		410	4
			>25~40	L	490		410	3
	Extruded aluminum profile	T6	7.0~10.0	L	490		370	7	GJB 2054-1994
			>10~25	L	530		400	6
	Extruded aluminum profile	T6	≤10	L	510		460	6	GJB 2057-1995
			>10~20	L	530		460	6
			>20~40	L	560		460	6
			>40	L	570		490	6
	Free forgings	T6	Weight≤30KG	L	510		420	6	GJB 2351-1995
			Weight>30KG	L	510		420	5
	Die forgings	T6	Weight≤30KG	L	530		440	6
			Weight>30KG	L	430		440	6

 

Alloy	Temper	Aircraft type	Application parts and typical parts
7A04	Aluminum plate:  T6,T9 Aluminum forgings:T6 Aluminum profile: T6	Y8, Y12	Skin, wall board, all kinds of beams (backlog, forgings), frame, fin, long truss, joint, landing gear and so on.

 

Detailed Photos