2A11 Aircraft aerospace aluminum plate sheet profile forgings

Chemical Compostion of 2A11 Aircraft Aerospace Aluminum Alloy sheet profile forgings

Alloy

Others

Each

Total

2A11

0.70

3.8~4.8

0.4~0.8

0.10

0.30

0.15

0.05

0.15

Remainder

Alloy	Alloy Series	Main Features	Σb Values/MPa	Temperature /℃
2A11	Al-Cu-Mg	The alloy can be heat-treated with high strength and medium plasticity after solid solution heat treatment and natural aging. The welding performance of the alloy is better.	285～400	<150

Technical indexes of common 2A11 aluminum alloy
Alloy	Type	Temper	δ or d/mm	σ_b/MPa	σ_{p 0.2}/MPa	δ/%	K_{IC or} K_C/MPa	Standard
2A11	Clad aluminum sheet	O	0.5～2.9	≤225		12	～	GB/T 3880
		O	>2.9	≤235		12	～
		T42	0.5～2.9	≥350	≥185	15	～
		T42	>2.9	≥355	≥195	15	～
		T3	0.5～1.6	≥375	≥215	15	～
			>1.6			17
			>2.9			15
		T4	0.5～2.9	≥360	≥185		～
		T4	>2.9	≥370	≥195		～
		T42	>4.5	≥355	≥195	15	～
		T42	>10.0	≥370	≥215	11	～
		T42	>12.5	≥370	≥215	11	～
			>25.0	≥330	≥195	8
			>40.0	≥310	≥195	6
		F	>70.0	≥285	≥195	4	～
2A11	Aluminum sheet	O	0.5～2.5	≤225	－	12	～	GJB 2053
		O	>2.5	≤235	－	12	～
		T4	0.5～2.5	≥365	≥185	15	～
		T4	>2.5	≥375	≥195	15
2A11	Aluminum plate	O	7～10	≤235	－	12	～	GJB 2662
		T4	7～10	≥370	≥196	5	～
		T4	7～10	≥355	≥186	12	～
			>10	≥370	≥215	11	～
			>25	≥335	≥196	8	～
			>40	≥315	≥196	6	～
			>70	≥285	≥196	4	～
2A11	Aluminum pipe	O	All	≤245	－	10	～	GB/T 4437
		T4	≤120	≥355	≥195	12	～
		T4	>120	≥375	≥215	10
2A11	Extruded pipe（wall thickness 5-35mm)	O	25～250	≤245		10		GJB 2381
		T4	25～120	≥350	≥196	12
		T4	120～250	≥370	≥215	10
2A11	Extruded round bar	T4	≤160	≥375	≥215	12		GB/T 3191
2A11	Extruded round bar	T4	>160	≥355	≥195	10		GB/T 3191
2A11	Extruded round bar	T4	5～150	≥375	≥215	12
	Extruded round bar	T4	>150	≥340	≥200	8
	Extruded round bar	T4	≤30	≥375	≥215	12		HB 5202
			31～165	≥390	≥235	10
			161～240	≥375	≥215	10
2A11	High Strength Extruded round ba	T4	23～240	≥420	≥275	9		HB 5202
2A11	Extruded aluminum profile	O	All	≤245		9		GJB 2507
		T4	≤10.0	≥355	≥215	12
			>10.0	≥375	≥225	12
			>20.0	≥400	≥245	12

2A11 Mechanical properties of alloy cold drawn pipes
Alloy	Type	Temper	Pipe Size /mm		σ_b/MPa	σ_{p 0.2}/MPa	δ/%	Technical Standard
			OD d	Wall thickness δ
2A11	Cold drawn Pipes	F	所有尺寸		≤245	－	10	GJB 2379-1995
		T4	<22	≤1	≥375	≥195	13
				1.5～2.0			14
			22～50	≤1	≥390	≥225	12
				1.5～5.0			13
			>50	≤5.0	≥390	≥225	11
			Pipes		≥390	≥225	12

2A11 T4 Mechanical properties of aluminum alloy forgings and die forgings
Alloy	Type	L			LT			ST		HBS	Technical Standard
Alloy	Type	σ_b/MPa	σ_{p 0.2}/MPa	δ/%	σ_b/MPa	σ_{p 0.2}/MPa	δ/%	σ_b/MPa	δ/%	HBS	Technical Standard
2A11	Free forgings	355	－	10	335	－	5	315	4	95	GJB 2351
		355	－	10	335	－	5	315	4	95	GJB 2351
		375	－	11	335	－	5	315	4	95	HB 5204
	Die Forgings	375	195	12	355	175	6	325	5	95	GJB 2351
		375	196	12	355	177	6	325	5	95	GJB 2351
		390	205	13	355	175	6	325	5	95	HB 5204
	Blade die forgings	355	－	13	－	－	－	－	－	95	GJB 2380

2024 Wedding Property
Alloy	Resistance welding	Melting welding	Argon arc welding	Note
2A11	Good	Worse	Worse	For gas welding and argon arc welding of aluminum alloy as solder, tend to form crystalline cracks; 4A01 alloy solder, forming cracks tend to be significantly reduced, but the strength of welded joint is greatly reduced, such as heat treatment after welding, the joint strength is close to the substrate, but the ductility decreases.

Alloy	Temper	Application model	Application parts and typical parts
2A11	Sheet： O、T3、T4、T42、F Plate： O、T4 Cold drawn tube：O、T3 Extruded tube,profile：O、T4 Tube：F、T4 Forgings: T4	Y8	Front of the fuselage

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