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Grade LY12
Corresponding Standard GBn 167-1982
Aluminum and aluminum alloy sheets of heat-treatable strengthening grades
Classification Aluminum and Aluminum Alloys
LY12 Chemical Element Composition Content (%)
Component Fe Si Mn Ni Cu Ti Zn Mg More
Minimum Value - - 0.3 - 3.8 - - 1.2 Al: Remainder
Maximum Value 0.5 0.5 0.9 0.1 4.9 0.15 0.3 1.8
LY12 Mechanical Properties
thickness
t
mm		 Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
0.3~4 LY12M annealed ≤216 - ≥14
>4~10 LY12M annealed ≤235 - ≥12
0.3~3 LY12BM unclad annealed ≤235 - ≥12
>3~10 LY12BM unclad annealed ≤235 - ≥11
0.5~4 LY12JM heavy clad annealed ≤225 - ≥10
1~2.5 LY12M annealed (variable section) ≤225 - ≥10
>2.5 LY12M annealed (variable section) ≤235 - ≥10
0.3~2.5 LY12CZ quenched and natural aged (include variable section sheet) ≥415 ≥275 ≥13
>2.5~6 LY12CZ quenched and natural aged (include variable section sheet) ≥435 ≥285 ≥11
>6~10 LY12CZ quenched and natural aged (include variable section plate) ≥435 ≥285 ≥10
0.3~1.5 LY12BCZ unclad quenched and natural aged ≥450 ≥295 ≥13
>1.5~6 LY12BCZ unclad quenching and natural aged ≥450 ≥295 ≥11
>6~10 LY12BCZ unclad quenched and natural aged ≥450 ≥295 ≥10
0.5~4 LY12JCZ heavy clad quenched and natural aged ≥370 ≥235 ≥13
1.5~2.5 LY12CZY quenched and natural aged and hardened ≥435 ≥340 ≥10
>2.5~6.5 LY12CZY quenched and natural aged and hardened ≥465 ≥350 ≥8
1.5~3 LY12BCZY unclad quenched and natural aged and hardened ≥485 ≥365 ≥10
>3~6.5 LY12BCZY unclad quenched and natural aged and hardened ≥485 ≥365 ≥8
0.3~0.8 LY12MCZ annealed quenched and natural aged ≥400 ≥250 ≥15
>0.8~2.5 LY12MCZ annealed quenched and natural aged ≥400 ≥260 ≥15
>2.5~10 LY12MCZ annealed quenched and natural aged ≥420 ≥270 ≥12
0.3~10 LY12BMCZ unclad annealed quenched and natural aged ≥435 ≥280 ≥10
0.5~4 LY12JMCZ heavy clad, annealed, quenched, natural aged ≥355 ≥225 ≥13
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

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