7075 - GB /T 32249-2015

Grade	7075
Corresponding Standard	GB /T 32249-2015 Aluminum and aluminum-alloy die forgings, hand forgings and rolled ring forgings - General specification
Classification	Aluminum and Aluminum Alloys

7075 Chemical Element Composition Content (%)

Component	Fe	Si	Mn	Cr	Cu	Ti ^①	Zn	Mg	Other Individual	Other Total ^*	More
Minimum Value	-	-	-	0.18	1.2	-	5.1	2.1	-	-	Al:余量
Maximum Value	0.5	0.4	0.3	0.28	2	0.2	6.1	2.9	0.05	0.15	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.

7075 Mechanical Properties

thickness t mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Die Forging; t≤25	7075T6	Solution + artificial aging T6	≥517① ≥490②	≥441① ≥421②	≥7①,≥10⑤① ≥3②	≥135
Forging; 25＜t≤50			≥510① ≥490②	≥434① ≥421②	≥7① ≥3②	≥135
Forging; 50＜t≤75			≥510① ≥483②	≥434① ≥414②	≥7① ≥3②	≥135
Die forgings; 75＜t≤100			≥503① ≥483②	≥427① ≥414②	≥7① ≥2②	≥135
Die forgings; t≤75	7075T73	Solution heat treatment + artificial aging T73	≥455① ≥427②	≥386① ≥365②	≥7① ≥3②	≥125
Die forgings; 75＜t≤100			≥441① ≥421②	≥379① ≥359②	≥7① ≥2②	≥125
Die forgings; t≤75	7075T7352	Solution heat treatment + artificial aging + stress relief T7352	≥455① ≥427②	≥386① ≥352②	≥7① ≥3②	≥125
Die forgings; 75＜t≤100			≥441① ≥421②	≥365① ≥338②	≥7① ≥2②	≥125
Rolled Ring Forgings; t≤50	7075T6	Solution + artificial aging T6	≥503 (tangential) ≥496 (axial) ≥469 (radial)③	≥427 (tangential) ≥421 (axial) ≥400 (radial)③	≥7 (tangential) ≥3 (axial) ≥2 (radial)③
Rolled Ring Forging; 50＜t≤90			≥490 (tangential) ≥483 (axial) ≥-(radial)③	≥414 (tangential) ≥407 (axial) ≥-(radial)③	≥6 (tangential) ≥3 (axial) ≥-(radial)③
Rolled Ring Forgings; t≤50	7075T652	Solution heat treatment + artificial aging + stress relief T652	≥503 (tangential) ≥496 (axial) ≥469 (radial)③	≥427 (tangential) ≥421 (axial) ≥400 (radial)③	≥7 (tangential) ≥3 (axial) ≥2 (radial)③
Rolled Ring Forging; 50＜t≤90			≥490 (tangential) ≥483 (axial) ≥-(radial)③	≥414 (tangential) ≥407 (axial) ≥-(radial)③	≥6 (tangential) ≥3 (axial) ≥-(radial)③
Free Forged Pieces; 50<t≤75	7075T6	Solution + artificial aging T6	≥503 (longitudinal) ≥490 (longitudinal transverse) ≥476 (short transverse)	≥421 (longitudinal) ≥407 (long transverse) ≥400 (short transverse)	≥9 (longitudinal) ≥4 (long transverse) ≥3 (short transverse)
Open die forgings; 75＜t≤100			≥490 (longitudinal) ≥483 (longitudinal transverse) ≥469 (short transverse)	≥414 (longitudinal) ≥400 (long transverse) ≥393 (short transverse)	≥8 (longitudinal) ≥3 (long transverse) ≥2 (short transverse)
Open die forgings; 100＜t≤127			≥476 (longitudinal) ≥469 (longitudinal transverse) ≥455 (short transverse)	≥400 (longitudinal) ≥386 (long transverse) ≥386 (short transverse)	≥7 (Longitudinal) ≥3 (Long Transverse) ≥2 (Short Transverse)
Open die forgings; 127＜t≤152			≥469 (longitudinal) ≥455 (longitudinal transverse) ≥448 (short transverse)	≥386 (longitudinal) ≥379 (long transverse) ≥379 (short transverse)	≥6 (longitudinal) ≥3 (long transverse) ≥2 (short transverse)
Free Forging; t≤50	7075T652	Solution heat treatment + artificial aging + stress relief T652	≥510 (longitudinal) ≥503 (longitudinal transverse)	≥434 (longitudinal) ≥421 (longitudinal transverse)	≥9 (longitudinal) ≥4 (longitudinal transverse)
Free Forged Pieces; 50<t≤75			≥503 (longitudinal) ≥490 (longitudinal transverse) ≥476 (short transverse)	≥421 (Longitudinal) ≥407 (Long Transverse) ≥393 (Short Transverse)	≥9 (longitudinal) ≥4 (long transverse) ≥2 (short transverse)
Open die forgings; 75＜t≤100			≥490 (longitudinal) ≥483 (longitudinal transverse) ≥469 (short transverse)	≥414 (longitudinal) ≥400 (long transverse) ≥386 (short transverse)	≥8 (longitudinal) ≥3 (long transverse) ≥1 (short transverse)
Open die forgings; 100＜t≤127			≥476 (longitudinal) ≥469 (longitudinal transverse) ≥455 (short transverse)	≥400 (longitudinal) ≥386 (long transverse) ≥379 (short transverse)	≥7 (longitudinal) ≥3 (long transverse) ≥1 (short transverse)
Open die forgings; 127＜t≤152			≥469 (longitudinal) ≥455 (longitudinal transverse) ≥448 (short transverse)	≥386 (longitudinal) ≥379 (long transverse) ≥372 (short transverse)	≥6 (longitudinal) ≥3 (long transverse) ≥1 (short transverse)
Free Forgings; t≤75	7075T73	Solution heat treatment + artificial aging T73	≥455 (longitudinal) ≥441 (longitudinal transverse) ≥421 (short transverse)	≥386 (longitudinal) ≥372 (long transverse) ≥359 (short transverse)	≥7 (longitudinal) ≥4 (longitudinal transverse) ≥3 (short transverse)
Open die forgings; 75＜t≤100			≥441 (longitudinal) ≥434 (longitudinal transverse) ≥414 (short transverse)	≥379 (longitudinal) ≥365 (long transverse) ≥352 (short transverse)	≥7 (Longitudinal) ≥3 (Long Transverse) ≥2 (Short Transverse)
Open die forgings; 100＜t≤127			≥427 (longitudinal) ≥421 (longitudinal transverse) ≥400 (short transverse)	≥365 (longitudinal) ≥352 (long transverse) ≥345 (short transverse)	≥7 (Longitudinal) ≥3 (Long Transverse) ≥2 (Short Transverse)
Open die forgings; 127＜t≤152			≥421 (Longitudinal) ≥407 (Long Transverse) ≥393 (Short Transverse)	≥352 (longitudinal) ≥345 (long transverse) ≥338 (short transverse)	≥6 (longitudinal) ≥3 (long transverse) ≥2 (short transverse)
Free Forgings; t≤75	7075T7352	Solution heat treatment + artificial aging + stress relief T7352	≥455 (longitudinal) ≥441 (longitudinal transverse) ≥421 (short transverse)	≥372 (longitudinal) ≥359 (long transverse) ≥345 (short transverse)	≥7 (longitudinal) ≥4 (longitudinal transverse) ≥3 (short transverse)
Open die forgings; 75＜t≤100			≥441 (longitudinal) ≥434 (longitudinal transverse) ≥414 (short transverse)	≥365 (longitudinal) ≥345 (long transverse) ≥331 (short transverse)	≥7 (Longitudinal) ≥3 (Long Transverse) ≥2 (Short Transverse)
Open die forgings; 100＜t≤127			≥427 (longitudinal) ≥421 (longitudinal transverse) ≥400 (short transverse)	≥352 (longitudinal) ≥331 (long transverse) ≥317 (short transverse)	≥7 (Longitudinal) ≥3 (Long Transverse) ≥2 (Short Transverse)
Open die forgings; 127＜t≤152			≥421 (Longitudinal) ≥407 (Long Transverse) ≥393 (Short Transverse)	≥338 (longitudinal) ≥317 (long transverse) ≥303 (short transverse)	≥6 (longitudinal) ≥3 (long transverse) ≥2 (short transverse)
Free Forging; t≤50	7075T6		≥510 (longitudinal) ≥503 (longitudinal transverse)	≥434 (longitudinal) ≥421 (longitudinal transverse)	≥9 (longitudinal) ≥4 (longitudinal transverse)

Approximate Comparison Table Wrought aluminum and aluminum alloy

China	United States		International Organization for Standardization		Germany		European Standard	Australia
ISC	ASTM	UNS	ISO	Numerical Grade	W-Nr.	L-Nr.	EN	Australian Standard AS
7075	7075	A97075	AlZn5.5MgCu	A97075	AlZnMgCu1.5	3.4365 A97075	EN-AW-AlZn5.5MgCu	7075 A97075

7075 Corresponding Standards(Same grade name, different standards)

1	GB /T 3190-2008
	7075
2	DIN 1725-1-1983
	7075 AlZnMgCu 1.5 3.4365
3	GB /T 3190-2020
	7075
4	JIS H 4040-2015
	7075 A7075 BE A7075 BD
5	ISO 209-2007
	7075 (AlZn5.5MgCu)
6	GB /T 3191-2019
	7075
7	SAE AMS-QQ-A-250/12-2007
	7075 A97075
8	GJB 1741A-2008
	7075
9	GJB 2053A-2008
	7075
10	GJB 1741-1993
	7075
11	SAE AMS4045M-2000(R2022)
	7075
12	GB /T 32249-2015
	7075
13	GB /T 3880.1-2012
	7075

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