Aluminum Zinc Alloy

IN AW-7020

Available formats: Plates, bars, tubes and profiles.

Typical applications and uses

EN AW 7020 aluminum alloy is an invalid alloy for extrusion of complex sections. In laminated products, it has limitations when it comes to cold bending and adequate post-weld measures must be taken to avoid cracking and exfoliation due to stress corrosion cracking.

 

Its main application is welded structures of all kinds. EN AW 7020 aluminum alloy is a heat treatable aluminum alloy with zinc added as the main alloying element. This improves the mechanical property attributes of the material and increases its resistance to fatigue stress.

Heat treatments:

Profiles and tubes for welded structures and support structures, welded structures that require high tensile strength. Cures independently after fusion welding.

 

EN AW 7020 alloy is mainly used in aerospace applications and offers reasonable machinability. As a result, the surface finish allows the material to be protective anodized, but does not lend itself to aesthetic anodizing.

 

EN AW 7020 aluminum alloy forming and machining is good. Soldering, aesthetic anodizing, and brazing are not adequate; however, protective anodizing can be performed if necessary.

Chemical Composition According to EN 573? 3

%
Si
Fe
Cu
Mn
Mg
Cr
Zn
Ti
Bi
Zr
Others
Al

Min.

-

-

15

0,05

1

0,1

4

-

-

0,08

-

-

Max.

0,35

0,4

0,2

0,5

1,4

0,35

5

-

-

0,2

0,15

Rest

Chemical Composition According to EN 573? 3

Element
Min.%
Max. %

Si


Fe


Cu


Mn


Mg


Cr


Zn


Ti


Bi


Zr


Others


Al

-


-


0,15


0,05


1


0,1


4


-


-


0,08


-


-

0,35


0,4


0,2


0,5


1,4


0,35


5


-


-


0,2


0,15


Rest

International Equivalences

USA
SPAIN
FRANCE
GERMANY
GB
SWEDEN
SWITZERLAND
CANADA
ITALY

AA

UNE

AFNOR

DIN (1712-1725)

BS

SIS

VSM

ALCAN

UNI

7020

L-3741

A-Z5G

AlZn4,5Mg1

H17

4425

AlZn4,5Mg1

D74S

9007 / 1

International Equivalences

USA AA 7020
Spain UNE L-3741
France AFNOR A-Z5G
Germany DIN (1712-1725) AlZn4,5Mg1
GB BS H17
Sweden SIS 4425
Switzerland VSM AlZn4,5Mg1
Canada ALCAN D74S
Italy UNI 9007 / 1

General Physical Properties

Module
Elastic
N / mm²
Weight
specific
gms / cm³
Temperature
of fusion
in ° C
Coefficient of
linear dilation
? m / mK
Conductivity
thermal
W / mK
Resistivity
electric
?? m
Conductivity
electric
% IACS
Potential of
dissolution
V

70.000

2,78

605 - 645

23,3

139 - 140

49

35

-0,81

Physical Properties

Elastic module
N / mm²
70.000
Specific weight
gms / cm³
2,78
Melting temperature
in ° C
605 - 645
Linear expansion coefficient
? m / mK
23,3
Thermal conductivity
W / mK
139 - 140
Electrical resistivity
?? m
49
Electric conductivity
% IACS
35
Dissolution potential
V
-0,81

Technological skills (MB Very Good | B Good | C Correct | R Regular | M Bad)

WELDING

  • To the flame (B)
  • Al arc under argon gas (B)
  • By electrical resistance (B)
  • Braised (B)

ANODIZED

  • Protective (B)
  • Decorative (M)
  • Hard anodized (B)

MECHANIZATION

  • Chip Fragmentation (MB)
  • Surface brightness (B)

REPUJADO

  • In state: O (-)

NATURAL BEHAVIOR

  • In rural environment (R)
  • In industrial environment (R)
  • In marine environment (R)
  • In seawater (R)

COVERING

  • Lacquered (B)
  • Galvanized (B)
  • Chemical nickel (B)

EMBUTITION

  • By expansion (M)
  • Deep drawing (R)

FOOD

  • Food use (M)

Formats

  • Aluminum Plates Zinc Alloy EN AW- 7020
  • Aluminum Bars Zinc Alloy EN AW- 7020
  • Aluminum Tubes Zinc Alloy EN AW- 7020
  • Aluminum Profiles Zinc Alloy EN AW- 7020

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