7049 T7351 is an Al-Zn-Mg-Cu (Aluminum-Zinc-Magnesium-Copper) alloy developed for applications requiring high strength and good corrosion resistance. This alloy is particularly designed for thick plates and structural components. Its chemical composition typically consists of 8–9% zinc, 2.0–2.5% magnesium, 2.0–2.5% 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, providing 7049 T7351 with high strength and durability for thick components.

In terms of mechanical properties, 7049 T7351 in the T7351 heat-treated condition typically offers a yield strength of 500–540 MPa and a tensile strength of 570–620 MPa. With approximately 9% elongation, it balances high hardness and toughness. These characteristics make the alloy particularly suitable for aerospace applications such as aircraft wing spars, fuselage frames, and large structural components. Its high strength and stable performance in thick parts make it stand out among 7000 series aluminum alloys.

Regarding machinability, 7049 T7351 performs well and can be processed by milling, turning, and other mechanical operations. However, due to its high zinc and copper content, its weldability is limited, and there is a risk of cracking during welding. Formability is moderate; it is better suited for thick and flat plates rather than complex geometries. Therefore, the alloy is preferred for precise machine components and large structural elements.

In terms of corrosion resistance, 7049 T7351 shows relatively high resistance among 7000 series alloys. Especially in thick plates and structural components after heat treatment, it provides stable performance against corrosion. However, in humid and saline environments, there is a risk of stress-corrosion cracking, so surface treatments or protective coatings are important. Considering all these properties, 7049 T7351 is widely used in aerospace, defense, and other high-performance applications that require high strength, good hardness, and reasonable corrosion resistance.

MATERIAL COMPOSITION STANDARDS

7049 T7351 is available according to the following standards:
• 7049 T7351 Plate; AMS 4200, ASTM B209, ISO AlZn8MgCu, AFNOR A-Z8GU, UNS A97049
 

Characteristic Properties of 7049 T7351: 

• Strength: High
• Machinability: Excellent
• Weldability: Poor
• Formability: Moderate
• Corrosion Resistance: Very Good
• Heat Treatable: Yes
   

Some Well-Known Applications of 7049 T7351: 
In structural forged components,
As structural components in military fuselages,
Also widely used in the aerospace industry.
 

STOCK
7049 T7351 is supplied in plate form.

• Plate