Aluminum Zinc Alloy

EN AW-7021

Available formats: Sheet metal, plates, bars, tubes and profiles.

Typical applications and uses

Aluminum Alloy Zinc EN AW 7021 is especially recommended for the following applications: Resin transfer molding, Compression molding, Resin injection molding, Blow molding, Thermoforming.

 

The main alloy addition is zinc and is formulated for primary formation in forged products, it is not recommended for complex shapes and sharp corners. For these applications, we recommend the use of laminated products whenever possible.

Heat treatments:

Short chip alloy with very high strength, less stress than other tooling alloys. This alloy has a moderate resistance to corrosion and is suitable for welding.

 

Thanks to its high mechanical strength, excellent brightness and dimensional stability during use and processing, it is suitable for creating molds for plastic materials, models, special technical molds and structures for hydraulic applications. It guarantees the minimum porosity in the whole section of the plate.

Chemical Composition According to EN 573? 3

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

Min.

-

-

-

-

1,2

-

5

-

-

0,08

-

-

Max.

0,25

0,4

0,25

0,1

1,8

0,05

6

0,1

-

0,18

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

-

-

-

-

1,2

-

5

-

-

0,08

-

-

0,25

0,4

0,25

0,1

1,8

0,05

6

0,1

-

0,18

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

7021

-

-

AlZn5.5Mg1.5

-

-

-

-

-

International Equivalences

USA AA 7021
Spain UNE -
France AFNOR -
Germany DIN (1712-1725) AlZn5.5Mg1.5
GB BS -
Sweden SIS -
Switzerland VSM -
Canada ALCAN -
Italy UNI -

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

2,8

510 - 630

23

125-155

38-52

21-24

-0,81

Physical Properties

Elastic module
N / mm²		 70.000
Specific weight
gms / cm³		 2,8
Melting temperature
in ° C		 510 - 630
Linear expansion coefficient
? m / mK		 23
Thermal conductivity
W / mK		 125-155
Electrical resistivity
?? m		 38-52
Electric conductivity
% IACS		 21-24
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 (M)
  • By electrical resistance (M)
  • Braised (B)

ANODIZED

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

MECHANIZATION

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

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- 7021
  • Aluminum sheets Zinc Alloy EN AW- 7021
  • Aluminum Bars Zinc Alloy EN AW- 7021
  • Aluminum Zinc Alloy Tubes EN AW- 7021
  • Aluminum Profiles Zinc Alloy EN AW- 7021

Specialized Technical Advice

We have specialized staff with extensive experience in the sector for any specific advice they need.

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