2A02 Aircraft aerospace aluminum bar forgings

2A02 Aircraft Aerospace Aluminum Bar Forgings is a kind of alloy with high strength in hard aluminum. It is characterized by high strength at normal temperature and high thermal strength, which belongs to heat-resistant hard aluminum. The alloy has high plasticity during hot deformation. It has a tendency to form coarse grain ring in extruded semi-finished products, which can be strengthened by heat treatment and used in quenching and artificial aging. Compared with 2A70 and 2A80 heat-resistant forging aluminum, the corrosion stability is better, but it has the tendency of stress corrosion cracking, and the weldability is better than that of 2A70, and the machinability is good.

Chemical Composition of 2A02 Aircraft Aerospace Aluminum Bar Forgings

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Ni

Zn

Ti

Zr

Other

Al

Single

Total

2A02

0.30

0.30

2.6~3.2

0.45~0.7

2.0~2.4

－

－

0.10

0.15

－

0.05

0.15

allowance

Alloy	Alloy Series	Main Features
2A02	Al-Cu-Mn	The heat treatment strengthened alloy, Al-Cu-Mg system, has high strength and plasticity, high heat resistance and corrosion resistance in artificial aging. It is used to manufacture aero turbojet axial compressor blades and other parts at 200 --300℃.

Technical Standard	Type	D/mm	Temper	Direction	Rm/Mpa	Rp0.2/Mpa	A/%	HBS
					Not less than
GB/T 3191	Extruded aluminum bar	All Diameters	T6	L	430	275	10	－
GJB 2054 HB 5202	Extruded aluminum bar	≤240	T6	L	430	275	10	－
GJB 2351 HB 5204	Forgings	Follow the contract	T6	L	390	255	10	100

Mechanical Properties of 2A02 T6 Alloy Extruded Strip (30 x 130mm) at Different Temperatures
Temperatures/℃	Rm/Mpa	Rp0.01/Mpa	Rp0.2/Mpa	A10/%	Z/%
20	491	274	325	13.0	21.2
100	471	247	288	15.6	22.8
150	428	268	296	16.1	28.7
200	374	228	274	16.1	33.4
250	236	128	168	16.9	66.6
300	171	94	112	21.5	75.9
350	108	25	59	27.6	85.6

Typical Mechanical Properties of 2A06 T6 Alloy Bar at Room Temperature
Specs d/mm	Rm/Mpa			Rp0.2/Mpa			A10/%
	Min.	Max.	Average	Min.	Max.	Average	Min.	Max.	Average
31	500	545	514.5	305	430	360.2	10	20	15.3
33	500	570	525.3	335	440	366.3	11	18	15.1
36	495	555	522.4	335	380	358.4	11	20	15.5

Typical Mechanical Properties of 2A02 T6 Alloy strip and Die Forgings at Room Temperature
Type	Specs/mm	Direction	Rm/Mpa	Rp02/Mpa	A10/%
Extruded strip	Shape 60×110	L	510	338	17.5
		LT	436	294	17
		ST	436	294	11.5
Forgings	Compressor blade	L	412~441	－	10