What is the difference between 7175 and 7075 Aluminum?

7175 VS 7075 Aerospace Aluminum Alloys

Both 7175 and 7075 are high-strength aluminum alloys widely used in the aerospace industry, but they exhibit distinct differences in the following areas:

Chemical Composition

Physical Properties

Mechanical Properties

Specific Applications in Aerospace

• 7075 Aluminum Alloy:
  Commonly used for aerospace structures and mechanical components, such as:

• Aircraft fuselage frames

• Wing spars and trusses

• Boarding stairs and lightweight aerospace parts

• 7175 Aluminum Alloy:
  Specially designed for critical components requiring high strength and fatigue performance, such as:

• Landing gear struts

• Key load-bearing components (e.g., wing root joints)

• Fasteners and other critical high-safety parts

Material Selection Guidance

• Choosing 7075:
  Opt for 7075 when high strength is required, environmental load is moderate, and lightweight design is a priority. Suitable for general aerospace structures and mechanical components.

• Choosing 7175:
  Select 7175 in high-fatigue environments or where fracture toughness is critical (e.g., dynamic loads or long-term service). Ideal for core load-bearing structures in aircraft.