2A70 Aircraft aerospace aluminum plate forgings profile

Chemical Property of 2A70 Alloy

Alloy

Others

Each

Total

2A70

0.35

0.9~1.5

1.9~2.5

0.2

1.4~1.8

－

0.9~1.5

0.30

0.02~0.10

－

0.05

0.15

Remainder

Alloy	Alloy series	Main Features
2A70	Al-Cu-Mg-Ni	Heat treatment strengthened alloy, Al-Cu-Mg-Si heat treated aluminum alloy, heat resistant alloy used in artificial aging, and 2A70, 2A80 and 2A90 alloy used in aviation industry. 2A70 alloy has the highest heat resistance, the most widely applied and the applied temperature is 200~250 C. the alloy has good technological characteristics, and can be processed into plates, strips, rods, profiles and free forgings, die forgings and so on. In aircraft manufacturing, it is mostly used for forging engine piston, impeller, wheel, compressor blade, and other parts used at high temperature.

Calibration mechanical properties of 2A70 T6 alloy
Standard	Type	d/mm	Direction	R_m/Mpa	A₅/%	HBS
GB/T 3191	Extrusion aluminum round bar	≤150	L	355	8	－
GJB 2054	Aluminum round bar	5~150	L	355	8	－
GJB 2054	Aluminum round bar	>150	L	345	6	－
HB 5202	Extruded aluminum round bar	≤22	L	355	8.0	－
HB 5202	Extruded aluminum round bar	23~160	L	375	8.0	－
GJB 2351	Free forgings and die forgings	－	L	375	4.0	110
			LT	375	4.0
			ST	375	4.0
HB 5204	Free forgings	－	L	375	5.0	110
			LT	375	5.0
			ST	375	5.0
	Die forgings	－	L	380	5.0	110
			LT	380	5.0
			ST	380	5.0
Typical room temperature mechanical properties of alloy 2A70 T6
Type	Temper	δ/mm	Direction	R_m/Mpa	R_p0.2/Mpa	A₅/%
Clad aluminum sheet	O	1.0~10	L	245		15
	T6	1.0~1.5	L	392	265	13
		1.6~2.5		402	275	12
		2.6~6.0		407	280	11
		6.0~10		407	280	10
Die forgings	T6	－	L	431	294	19.6
Die forgings	T6	－	LT	425	284	10.8

Mechanical properties of stabilized treatment of 2A70
Type	Stabilized treatment		R_m/Mpa	R_p0.2/Mpa	A/%	Type	Stabilized treatment		R_m/Mpa	R_p0.2/Mpa	A/%
Type	θ/℃	t/h	R_m/Mpa	R_p0.2/Mpa	A/%	Type	θ/℃	t/h	R_m/Mpa	R_p0.2/Mpa	A/%
Aluminum sheet	125	1000	363	324	9	Forgings sheet stock	175	100	333		8
		5000	363	－	9			1000	333		9
		10000	363	314	8			5000	314		9
		20000	363	294	7			10000	304		8
	150	100	402	343	－			20000	275		7
		1000	412	363	5			30000	265		8
		5000	382	333	6		195	100	314		10
		10000	314	284	8			1000	284		10
		20000	314	294	8			5000	275		12
	175	10	402	343	6			10000	255		12
		100	392	338	5			20000	245		12
		1000	392	324	6			30000	245		12
	200	10	412	353	5	Extrusion aluminum profile	125	100	402	373	7.5
	200	100	373	314	6			1000	402	373	7.5
Forgings sheet stock	125	100	402	－	8			5000	392	358	7.5
		1000	422	－	6			10000	384	343	7
		5000	402	－	7			30000	384	333	8
		10000	402	－	7		150	100	397	363	8
		20000	373	－	7			1000	422	373	7
		30000	373	－	6			5000	384	358	7
	150	100	402	－	6			10000	343	343	8
		1000	392	－	6			30000	314	333	8
		5000	353	－	8		175	100	392	363	7.5
		10000	353	－	8		175	1000	373	333	8
		20000	314	－	7	Die forgings	130	100	412	343	12
		30000	314	－	6			1000	412	343	12
	150	10	412	333	11			10000	412	343	12
		100	407	333	10			30000	373	－	16
		1000	392	314	10	Die forgings	200	10	324	237	14
		30000	314	－	4			100	284	226	17
	175	10	363	314	11			1000	245	196	20
		100	353	304	13		250	10	196	177	18
		1000	333	255	15			100	177	118	20
		3000	255	－	18			1000	127	88	25

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