7020

Contact your nearest branch today for a quote...

Grade 7020 is a heat treatable aluminium alloy with zinc added as the main alloying element. This enhances the mechanical property attributes of the material and increases its resistance to fatigue stress.

The 7020 grade is primarily used in aerospace applications and offers a reasonable machinability. As a result the surface finish allows the material to be protective anodised but it will not lend itself to aesthetic anodising.

Forming and machining of aluminium / aluminum 7020 alloy is good. Welding, aesthetic anodizing and brazing or soldering is not suitable; however protective anodizing can be performed if required.

Chemical Composition

Aluminium     

Rem

Silicon

0.35% max

Copper

0.20% max

Iron

0.40% max

Manganese

0.05-0.50%

Magnesium   

1.0-1.4%

Zinc

4.0-5.0%

Zirconium

0.08-0.20%

Chromium

0.10-0.35%

Zirconium + Titanium       

0.08-0.25%

Total Others

0.15% max

 

 

Related Specifications

BS4300/15

AZ5G 

UNS: A97020 

BS H17

EN AW-7020

Al Zn4.5Mg1

DIN W/S 3.4335

BA 733

Key Features

  • Very good Mechanical Strengths
  • Good resistance to fatigue strength.
  • Good Machinability

Typical Physical Properties

Density                                               

2.78 g/cm³

Thermal conductivity                    

134 W/m°K

Thermal expansion coefficient       

23.1 x 10-6

Electrical Conductivity

37.5 IACS

Electrical resistivity

0.046 microhm m

Modulus of elasticity 

68 GPa

 Fabrication Properties

Cold Formability

Good

Machinability

Good

Weldability    

This grade is weldable but for more details contact the HD technical department.

Typical Applications

Grade 7020 is generally used in aerospace applications and for radiator and heat exchanger components.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at their own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

Contact your nearest branch today for a quote...

Translate  
International enquiries has a new dedicated email export@holmedodsworth.com:    •   Our Luton branch is now ISO Certified!: , Date: 21 Nov 2017   •   USD: 1.31467, EURO: 1.13248   •   Copper: 5200, Brass: 6170
Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702