LY12 十二号硬铝 2A12 - GJB 2379-1995

Grade	LY12
Other Names
Corresponding Standard	GJB 2379-1995 Specification for aluminium and aluminium alloys drawn(rolled) tubes for aerospace
Classification	Aluminum and Aluminum Alloys

LY12 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+Si≤0.5
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+Si≤0.5

"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.

Chemical composition in accordance with GB 3190-82
The four-character grades in the other names are from GB/T 3190-2008

LY12 Mechanical Properties

	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
All Sizes	LY12M	M	≤245	-	≥10
d＜22，t≤1	LY12CZ	CZ	≥410	≥255	≥13
d＜22，1.5≤t≤2	LY12CZ	CZ	≥410	≥255	≥14
22≤d≤50，t≤5	LY12CZ	CZ	≥420	≥285	≥12
d＞50，t≤5	LY12CZ	CZ	≥420	≥285	≥10
Section Tube	LY12CZ	CZ	≥420	≥265	≥10

Code and condition: M (O) = Soft；Y (HX8) = Hard；Y2 (HX4) = Half-Hard；CZ (T4) = Solution Heat Treated + Natural Aging；CS (T6) = Solution Heat Treated + Artificial Aging; New code name in parentheses

LY12 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	(LY12) 2A12
2	GB /T 3190-2020
	(LY12) 2A12
3	GB /T 3191-2019
	(LY12) 2A12
4	GBn 167-1982
	LY12
5	YS /T 439-2001
	(LY12) 2A12
6	GJB 1741-1993
	(LY12) 2024 2A12
7	GJB 2507-1995
	LY12 十二号硬铝
8	GJB 2379-1995
	LY12 十二号硬铝 2A12
9	GJB 2662A-2008
	(LY12) 2A12
10	GB /T 3880.1-2012
	(LY12) 2A12

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