2A12 - GJB 6470-2008

Grade	2A12
Corresponding Standard	GJB 6470-2008 Specification for aluminum alloy surface sheet for aerospace
Classification	Aluminum and Aluminum Alloys

2A12 Chemical Element Composition Content (%)

Component	Fe	Si	Mn	Ni	Cu	Ti	Zn	Mg	Other Individual	Other Total	More
Minimum Value	-	-	0.3	-	3.8	-	-	1.2	-	-	Al余量；Fe+Ni≤0.50
Maximum Value	0.5	0.5	0.9	0.1	4.9	0.15	0.3	1.8	0.05	0.1	Al余量；Fe+Ni≤0.50

"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.

2A12 Mechanical Properties

thickness t mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
0.3~4; Normal Aluminum Coating	2A12O	O (Sample and Supply Condition)	≤215	-	≥14(A10)
>4~10; Normal aluminum cladding	2A12O	O (Sample and Supply Condition)	≤235	-	≥12(A10)
0.3~0.8; Normal Aluminum Coating	2A12O 2A12T42	Supply State O Sample State T42	≥390	≥245	≥15(A10)
>0.8~2.5; Normal Aluminum Coating	2A12O 2A12T42	Supply State O Sample State T42	≥390	≥255	≥15(A10)
>2.5~10; Normal aluminum cladding	2A12O 2A12T42	Supply State O Sample State T42	≥410	≥265	≥12(A10)
0.3~2.5; Normal Aluminum Coating	2A12T4	T4 (Sample and Delivery State)	≥405	≥270	≥13(A10)
>2.5~6; Normal aluminum coating	2A12T4	T4 (Sample and Delivery State)	≥425	≥280	≥11(A10)
>6~10; Normal aluminum cladding	2A12T4	T4 (Sample and Delivery State)	≥425	≥280	≥10(A10)
1.5~2.5; Normal Aluminum Coating	2A12T0	T0 (Sample and Supply Condition)	≥425	≥335	≥10(A10)
>2.5~6.5; Normal Aluminum Coating	2A12T0	T0 (Sample and Supply Condition)	≥455	≥345	≥8(A10)
0.3~3; no aluminum coating	2A12O	O (Sample and Supply Condition)	≤235	-	≥12(A10)
>3~10; Excluding aluminum	2A12O	T4 (Sample and Delivery State)	≤235	-	≥11(A10)
0.3~10; Excluding aluminum	2A12O 2A12T42	Supply State O Sample State T42	≥425	≥275	≥10(A10)
0.3~1.5; No Aluminum Coating	2A12T4	T4 (Sample and Delivery State)	≥440	≥290	≥13(A10)
>1.5~6; No Aluminum Coating	2A12T4	T4 (Sample and Delivery State)	≥440	≥290	≥11(A10)
>6~10; Excluding aluminum	2A12T4	T0 (Sample and Supply Condition)	≥440	≥290	≥10(A10)
1.5~3; No Aluminum Coating	2A12T0	T0 (Sample and Supply Condition)	≥475	≥360	≥10(A10)
>3~6.5; Excluding aluminum	2A12T0	T0 (Sample and Supply Condition)	≥475	≥360	≥8(A10)
0.5~4; thick aluminum-coated	2A12O	O (Sample and Supply Condition)	≤225	-	≥10(A10)
0.5~4; thick aluminum-coated	2A12O 2A12T42	Supply State O Sample State T42	≥350	≥220	≥13(A10)
0.5~4; thick aluminum-coated	2A12T4	T4 (Sample and Delivery State)	≥365	≥230	≥13(A10)

2A12 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	2A12 (LY12)
2	GB /T 3190-2020
	2A12 (LY12)
3	GB /T 3191-2019
	2A12 (LY12)
4	GJB 1741A-2008
	2A12
5	GJB 2053A-2008
	2A12
6	YS /T 439-2001
	2A12 (LY12)
7	GJB 1741-1993
	2A12 2024 (LY12)
8	GJB 2379-1995
	2A12 LY12 十二号硬铝
9	GJB 2662A-2008
	2A12 (LY12)
10	GJB 6470-2008
	2A12
11	GB /T 3880.1-2012
	2A12 (LY12)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!