7050 T7451 is an Al-Zn-Mg-Cu (Aluminum-Zinc-Magnesium-Copper) alloy developed for applications requiring high strength and good corrosion resistance. This alloy is specifically designed for thick plates and structural components. Its chemical composition typically consists of 6–6.5% Zinc, 2.2–2.6% Magnesium, 2.0–2.3% Copper, with the remainder being Aluminum. Small amounts of Silicon, Chromium, Manganese, Titanium, or Zirconium are also added. These additions help stabilize the grain structure during heat treatment and preserve mechanical properties, giving 7050 T7451 high strength and durability in thick components.

In terms of mechanical properties, 7050 T7451 in the T7451 heat-treated condition typically offers 480–520 MPa yield strength and 540–590 MPa tensile strength. With an elongation of around 11%, it balances high hardness and toughness. These properties make the alloy highly suitable for aerospace applications, including aircraft wing spars, fuselage frames, and large structural components. Its stable performance in thick parts and high strength distinguish it among 7000 series aluminum alloys.

In terms of machinability, 7050 T7451 performs well and can be processed using milling, turning, and other mechanical operations. However, due to its high zinc and copper content, weldability is limited, and there is a risk of cracking during welding. Formability is moderate; it is more suitable for thick and flat plates rather than complex geometries. Therefore, the alloy is preferred for precision machine components and large structural elements.

Regarding corrosion resistance, 7050 T7451 exhibits relatively high performance among 7000 series alloys. It provides stable corrosion resistance in thick plates and structural elements after heat treatment. However, in humid and saline environments, stress-corrosion cracking can occur, so surface treatments or protective coatings are recommended. Considering all these features, 7050 T7451 is widely used in aerospace, space, and defense applications where high strength, good hardness, and reasonable corrosion resistance are required.
 

MATERIAL COMPOSITION STANDARDS

7050 T7451 is available in the following standards:
• 7050 T7451 Plate/Sheet; EN 3982, AIR 9048.740, AMS 4050, WNR 3.4144, UNS A97050, ISO AlZn6CuMgZr
• 7050 T7451 Extrusion Round Bar; EN 3338, WNR 3.4144, UNS A97050, ISO AlZn6CuMgZr
• 7050 T7451 Extrusion Bar; EN 3338, WNR 3.4144, UNS A97050, ISO AlZn6CuMgZr
• 7050 T7451 Extrusion Wire; EN 3338, WNR 3.4144, UNS A97050, ISO AlZn6CuMgZr
• 7050 T7451 Extrusion Tube; EN 3338, WNR 3.4144, UNS A97050, ISO AlZn6CuMgZr
 

Characteristic Properties of 7050 T7451: 

• Strength: Very good
• Machinability: Good
• Weldability: Poor
• Formability: Average
• Corrosion Resistance: High
• Heat Treatment: Yes
  
  
   

Some Well-Known Applications of 7050 T7451: 
Primarily in aerospace industry,
Aircraft fuselage and wing components,
Also used in the nuclear industry.
 

STOCK
7050 T7451 is available in plate/sheet, rod/bar, and tube/profile forms.

• Plate/Sheet
• Sheet
• Rod / Bar
• Tube/Profile