Aluminum Zinc Alloy
IN AW-7020
Available formats: Plates, bars, tubes and profiles.
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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