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EN AW-7050 · AlZn6CuMgZr

The premier thick-section aerospace alloy: zirconium grain refinement gives deep hardenability, so strength, fracture toughness and SCC resistance hold up through plates 150 mm and beyond. The standard for machined bulkheads and spars.

2.83g/cm³
Density
570MPa
Typical tensile strength (T7651)
71.7GPa
Elastic modulus
7000
Series — Al-Zn maximum strength

Material Data

Composition and physical properties

Chemical composition (% by mass)
ElementLimit / range
Si≤ 0.12
Fe≤ 0.15
Cu2.0 – 2.6
Mn≤ 0.10
Mg1.9 – 2.6
Zn5.7 – 6.7
Zr0.08 – 0.15
Ti≤ 0.06
Albalance

Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.

Physical properties (typical, room temperature)
PropertyValue
Density2.83 g/cm³
Melting range490 – 630 °C
Thermal expansion (20–100 °C)22.1 µm/m·K
Elastic modulus71.7 GPa
Thermal conductivity157 W/m·K
Electrical conductivity35 % IACS

Strength Data

Mechanical properties by temper

Typical room-temperature values for orientation. Design minimums depend on product form, thickness and the governing specification — request the applicable table with your inquiry.

Typical mechanical properties — EN AW-7050 (AlZn6CuMgZr)
TemperYield strength (MPa)Tensile strength (MPa)Elongation (%)Hardness (HB)
T745147954010140
T76515105709147
T73511 (extr.)4555159135
T74 / T7451145551510137
T76 / T765115055658145

Designations & Standards

How this alloy appears on drawings

Cross-reference designations
SystemDesignation
ISO / EN designationAlZn6CuMgZr
EN numericEN AW-7050
UNSA97050
Werkstoff-Nr.3.4144
Common product standardsAMS 4050, AMS 4201, AMS 4107, AMS 4340–4342, AMS 4243 (clad) · ASTM B209, B221 · EN 3982, EN 3338 · AIR 9048.740 · WNr 3.4144

Supply Program

Available from Lipol as

Catalog entries for EN AW-7050
Product formStandardAlloyTemperCategory
PlateAMS 40507050T7451Aerospace & Defense
PlateAMS 42017050T7651Aerospace & Defense
SheetAMS 42437050 cladT76Aerospace & Defense
Bar / FlatAMS 43417050T73511Aerospace & Defense
Bar / FlatAMS 41077050T74Aerospace & Defense
Bar / FlatAMS 43427050T74511Aerospace & Defense
Bar / FlatAMS 43407050T76511Aerospace & Defense
Tube / Profile / ExtrusionASTM B2217050T76Aerospace & Defense

Additional tempers, forms and specifications available on request — the table shows the standard program.

Applications

Where EN AW-7050 is the right answer

  • Fuselage frames and bulkheads
  • Wing skins and spar caps
  • Landing-gear support structure
  • Defense platforms

Specifying EN AW-7050?

State the temper, product form, dimensions and governing standard from the tables above, and we will confirm availability with a firm price and delivery date — typically within one business day.

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Material Engineering

Not sure EN AW-7050 is the right alloy?

Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.

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