Aluminium and aluminium alloys · Сплав AL5 - 3.4345

Technical parameters and characteristics of AL5 alloy (3.4345)

Technical characteristics of aluminum alloy AL5 (3.4345)

Regulating standard	Parameter	Value
Area	Parameter	EN
of application		28839
		–
		Mechanical
		properties
		of fasteners
		made
		of non-ferrous
		metals
		(bolts
Area of application	Parameter	screws
Area	Parameter	studs
of application		and
		nuts
		with
		metric
		thread)
Area	Value	High-strength
of application		fasteners
		and
		metalware
Area	Parameter	EN
of application		28839
		–
		Mechanical
		properties
		of fasteners
		made
		of non-ferrous
		metals
		(bolts
Area of application	Parameter	screws
Area	Parameter	studs
of application		and
		nuts
		with
		metric
		thread)
Area	Value	High-strength
of application		fasteners
		and
		metalware
Alternative	Parameter	EN
marking		28839
		–
		Mechanical
		properties
		of fasteners
		made
		of non-ferrous
		metals
		(bolts
Alternative marking	Parameter	screws
Alternative	Parameter	studs
marking		and
		nuts
		with
		metric
		thread)
Alternative marking	Value	WNr / DIN
Alternative	Parameter	EN
marking		28839
		–
		Mechanical
		properties
		of fasteners
		made
		of non-ferrous
		metals
		(bolts
Alternative marking	Parameter	screws
Alternative	Parameter	studs
marking		and
		nuts
		with
		metric
		thread)
Alternative marking	Value	3.4345

AL 5 alloy is a high-strength wrought aluminum material actively used in the production of critical fasteners with metric threads in the size range from M1.6 to M39. The key alloying component in AL 5 is zinc, which, in synergy with magnesium, provides the material with outstanding strength characteristics after heat treatment. Specialists at EV Group China confirm that Aluminium AL 5 alloy, conforming to EN 28839, demonstrates one of the highest specific strength indicators among aluminum alloys due to the controlled solubility of alloying elements. The material is characterized by excellent machinability on CNC machines, however, when designing welded structures, a special approach is required due to its limited weldability.

Chemical composition of AL5 alloy in %

Si	Parameter	Value
0.50	Mn	0.10-0.40
0.50	Cr	0.10-0.30
0.50	Cu	0.50-1.0
0.50	Mg	2.60-3.7
0.50	Zn	4.30-5.20
0.50	Fe	<0.50
0.50	Zr + Ti	<0.20
0.50	Al	Remainder

Mechanical properties of AL 5 material

Nominal thread diameter, d	Parameter	Value
d	Parameter	Tensile
≤		strength
M39		(Rm)



d ≤ M39	Parameter	MPa
d ≤ M39	Value	460
d ≤ M39	Parameter	Yield strength (Rp0.2)
d ≤ M39	Parameter	MPa
d ≤ M39	Value	380
d ≤ M39	Parameter	Elongation (A5)
d ≤ M39	Parameter	%
d ≤ M39	Value	7

International analogues of 3.4345 alloy

Germany (DIN/WNr)	Parameter	Value
European	3.4345,	EN
standards	AlZnMgCu0,5	AW-AlZn5Mg3Cu
(EN)		(EN
		AW-7022)