2A70 LD7 - GJB 3539-1999

Grade	2A70
Old Grade
Corresponding Standard	GJB 3539-1999 Specification for Aluminum Alloy Rod and Bar for Forging
Classification	Aluminum and Aluminum Alloys

2A70 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.

2A70 Mechanical Properties

diameter d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
Bars; 5≤d≤150	2A70H112 2A70T6	H112 (Delivery Condition) T6 (Sample Condition)	≥355	-	≥8
Bars; 150＜d≤250	2A70H112 2A70T6	H112 (Delivery Condition) T6 (Sample Condition)	≥345	-	≥6
Bars; 5≤d≤150	2A70O1 2A70T6	O1 (Delivery Condition) T6 (Sample Condition)	≥325	-	≥6
Bars; 150＜d≤250	2A70O1 2A70T6	O1 (Delivery Condition) T6 (Sample Condition)	≥315	-	≥5

2A70 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	2A70 (LD7)
2	GB /T 3190-2020
	2A70 (LD7)
3	GB /T 3191-2019
	2A70 (LD7)
4	GJB 3539-1999
	2A70 (LD7)

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