7075-T7 aluminum alloy is part of the high-strength 7xxx series and represents an overaged temper condition. This temper, commonly known as T73 or T76 variants, is designed to sacrifice some maximum strength in order to significantly improve corrosion resistance, particularly resistance to stress corrosion cracking (SCC). The 7075 alloy is zinc (Zn) based and is strengthened through precipitation hardening with magnesium and copper.

In terms of corrosion resistance, 7075-T7 performs significantly better than the T6 condition. Its resistance to stress corrosion cracking is greatly enhanced. Compared to 2024, it offers better SCC resistance, although it does not reach the general corrosion resistance level of 5xxx series alloys such as 5083. Compared to 6061, it provides higher strength and may exhibit similar or better corrosion behavior in certain environments.

Regarding strength and machinability, 7075-T7 has lower tensile and yield strength than the T6 condition but still offers very high strength compared to many aluminum alloys. It generally achieves higher strength levels than 2024-T3. Its machinability is excellent, making it suitable for precision machining applications. Due to overaging, internal stresses are reduced, improving dimensional stability.

In terms of bending properties, coatability, and weldability, 7075-T7 offers slightly better ductility than T6 but still has limited bending capability; therefore, forming is typically performed in the O temper. Weldability remains poor, and in this respect, 6061 is significantly superior. For coating, anodizing and other surface treatments can be applied, and the T7 temper may provide more stable and uniform surface results compared to T6.

Regarding vibration response and applications, 7075-T7 is widely used in aerospace and defense industries for critical structural components due to its high specific strength and improved corrosion resistance. It is commonly used in aircraft structures, fittings, and load-bearing components. While 5083 is used in marine applications, 6061 in general engineering, and 2024 in aerospace structures, 7075-T7 stands out as one of the best-balanced options in terms of strength and corrosion resistance.

MATERIAL COMPOSITION STANDARDS

7075 T7 can be produced according to the following standards.
• 7075 T7 Extrusion Round Bar; ASTM B221, AMS 4166, AMS QQ-A-200/11 DTD 5124
• 7075 T7 Extrusion Plate; ASTM B221, AMS 4166, AMS QQ-A-200/11 DTD 5124
• 7075 T7 Extrusion Wire; ASTM B221, AMS 4166, AMS QQ-A-200/11 DTD 5124
• 7075 T7 Extrusion Tube; ASTM B221, AMS 4166, AMS QQ-A-200/11 DTD 5124
 

Characteristic Properties of 7075 T73:

• Strength: High
• Machinability: Medium
• Weldability: Low
• Formability: Low
• Corrosion Resistance: Good
• Heat Treatment: Yes

Some Well-Known Applications of 7075 T7:
High-performance sports equipment,
Racing car components.
 

STOCK
7075 T7 is supplied in the form of tubes, rods, and extrusions.

• Tube / Rod / Extrusion