LF21 二十一号防锈铝 - GJB 2053-1994

Grade	LF21
Other Names
Corresponding Standard	GJB 2053-1994 Specification for aluminium alloys sheet for aerospace
Classification	Aluminum and Aluminum Alloys

LF21 Chemical Element Composition Content (%)

Component	Fe	Si	Mn	Cu	Ti	Zn ^①	Mg	Other Individual	Other Total	More
Minimum Value	-	-	1	-	-	-	-	-	-	Al余量
Maximum Value	0.7	0.6	1.6	0.2	0.15	0.1	0.05	0.05	0.1	Al余量

"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.

LF21 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
0.5~0.7	M	98~147	-	≥18
>0.7~3	M	98~147	-	≥22
>3~4	M	98~147	-	≥20
0.5~4	Y2	147~215	-	≥6
0.5~0.8	Y	≥186	-	≥2
>0.8~1.2	Y	≥186	-	≥3
>1.2~4	Y	≥186	-	≥4

LF21 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	(LF21) 3A21
2	GB /T 3195-2016
	(LF21) 3A21
3	GB /T 3190-2020
	(LF21) 3A21
4	GJB 2053A-2008
	(LF21) 3A21
5	GJB 2379-1995
	LF21 二十一号工防锈铝 3A21
6	GJB 2053-1994
	LF21 二十一号防锈铝
7	GB /T 3880.1-2012
	(LF21) 3A21

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