LD7 七号锻铝 - GJB 2054-1994

Grade	LD7
Other Names
Corresponding Standard	GJB 2054-1994 Specification for aluminium alloy rod and bar for aerospace
Classification	Aluminum and Aluminum Alloys

LD7 Chemical Element Composition Content (%)

Component	Fe	Si	Mn	Ni	Cu	Ti	Zn	Mg	Other Individual	Other Total	More
Minimum Value	0.9	-	-	0.9	1.9	0.02	-	1.4	-	-	Al:余量
Maximum Value	1.5	0.35	0.2	1.5	2.5	0.1	0.3	1.8	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.

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

LD7 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
5~150	Supply state R, CS; sample state CS	≥355	-	≥8
>150~250	Supply condition R; Sample condition CS	≥345	-	≥6

① When the diameter exceeds the range in the table, the longitudinal mechanical properties of the bar at room temperature shall be negotiated between the buyer and the contractor.
* Room temperature longitudinal mechanical properties of high-strength bars

LD7 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	(LD7) 2A70
2	GB /T 3190-2020
	(LD7) 2A70
3	GB /T 3191-2019
	(LD7) 2A70
4	GJB 2054-1994
	LD7 七号锻铝
5	GJB 3539-1999
	(LD7) 2A70

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