2090 aluminum lithium alloy sheet plate

The 2090 alloy is developed to replace the 7075 T6 alloy widely used in the aviation industry. The goal is: the tensile strength is equivalent to that of the 7075 T6 alloy, its density should be 8%, and the elastic modulus should be 10% higher. Production of high strength and medium strength and extruded 2090 alloy for its excellent weldability and mechanical properties at low temperature, 2090 aluminum lithium alloy sheet plate are more than 7075 alloy high temperature fracture toughness; tensile property anisotropy is very strong; peak aging state of the material (T68, T81, T83) had good stability in high temperature but, under aging condition (T84) will take effect of additional hardening is strong; have strong anti fatigue crack growth ability.

Chemical Composition of 2090 Alloy

Alloy

Others

Each

Total

2090

0.10

0.12

2.4~3.0

0.05

0.25

0.05

0.7~1.0

0.1

0.20~0.70

0.1

0.06~0.14

0.05

0.15

Remainder

Alloy	Alloy Series	Main Features	σb Value/MPa	Working Temperature/℃
2090	Al-Cu-Li-Zr	The heat treatment strengthened alloy has different properties and states, such as thin plate, thick plate and extruded parts. The state of sheet metal has O, T3, T31, T62, T83 and T84. Among them, the strength of the T83 state is the highest, similar to 7075 T6. The corrosion resistance and welding performance of 2090 T83 thin plates are better than that of 2024 T3 and 7075 T6 thin plates. The long time air exposure test showed that the 2090 T83 thin plate had superior corrosion resistance. The state of the thick plate is T81 and T84, and the strength of the T81 state is the highest, similar to 7075 T651. The state of the backlog is T86, T3, and T31, with the highest strength of the T86 state, similar to 7075 T6511.	－	<100

Physical Property of 2090 Alloy
Product and its sheet	Thickness/mm	Standard	Tension Strength					Flexible
			Direction	R_P0.2/MPa	R_m/MPa	50mm A/ %		Direction and K_{IC or}K_C	K_{IC or}K_C
T83 Aluminum sheet	0.8~3.175	AMS 4351	L L－T 45º	517(517)	530(530)		3(6)	L－T(K_C)	(44)
				503	505		5	－
				440	440		－	－
T83 Aluminum sheet	3.2~6.32	AMS 4351	L L－T 45º	483	4		－	－	－
				455	5		－	－	－
				385	－		－	－	－
T84 Aluminum sheet	0.8~6.32	AMS Draft D89	L L－T 45º	455(470)	495(525)		3（5）	L－T(K_C)	49（71）
				415	475		5	T－L(K_C)	49
				345	427		7	－	－
T3 O 7075 T6	－－－		L－T L－T L	214min	317min		6min	－	－
				193max	213max		11min	－	－
				(517)	(570)		(11)	L－T(K_C)	（71）
T86 Aluminum extruded profile	0.0~3.15 3.175~6.32 6.35~12.65	AMS Draft D88 BE －	L L L－T	470	517		4	－	－
				510	545		4	－	－
				517	550		5	－	－
				483	525		－	－	－
7075 T7 Aluminum plate T81 Aluminum plate	13~38	AMS4346	L L L－T	(510)	(565)		(11)	L－T(K_IC)	(27)
				483(517)	517(550)		4(8)	L－T(K_IC)	≥27(11)≥22
				470	517		3	L－T(K_IC)	－

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2090 aluminum lithium alloy sheet plate

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