Overview of 7075 T651 Aluminum Alloy
Although 7075 T651 aluminum sheet, plate, and bar were originally developed for aerospace and defense applications, their use has expanded significantly over time. Today, consumption in machinery manufacturing, mold making, packaging, and industrial equipment has exceeded that of the aerospace sector. This high-strength alloy is often regarded as a technological advancement that the aerospace industry has effectively "passed on" to the machinery and mold industries.
In particular, thick 7075 T651 aluminum plates are highly favored due to their outstanding strength and dimensional stability. The introduction of 7075 T651 and T7651 has reduced the need to select specialized 7000-series tooling plates such as Hokotol, Alumold, Certal, or Alumec solely for hardness requirements. When sourced from a manufacturer with excellent material homogeneity and maximum internal stress relief, 7075 T651 delivers exceptional performance and machining satisfaction.
As a bar or rod, 7075 T651 aluminum is frequently used in applications that closely rival traditional steel components, while offering significant weight reduction.
As a professional aluminum supplier, GNEE provides high-quality 7075 T651 aluminum products engineered for demanding industrial and structural applications.
Alloy Composition and Temper Definition
7075 T651 is an aluminum-zinc-magnesium-copper alloy designed for applications requiring very high strength and durability. The T651 temper indicates that the material has undergone:
Solution heat treatment
Quenching
Artificial aging
Controlled stretching for stress relief
This process minimizes internal stresses and ensures excellent dimensional stability, especially for precision-machined components.
Because of these properties, 7075 T651 remains a preferred choice for critical structural parts in aerospace, space, and defense industries, including aircraft fuselage components, helicopter structures, missile parts, and high-performance automotive applications.
Mechanical Properties of 7075 T651
7075 T651 aluminum alloy is recognized as one of the strongest commercially available aluminum alloys. Typical mechanical properties include:
Tensile strength: approximately 510–570 MPa
Yield strength: approximately 430–500 MPa
These high strength values allow components to maintain long service life under repeated loads, vibrations, and high stress conditions. Compared to T6 temper, T651 provides similar strength while significantly improving machining stability by reducing the risk of distortion caused by residual stresses.
Machinability and Fabrication
Due to its high strength, 7075 T651 is more challenging to machine than standard aluminum alloys. However, excellent results can be achieved through proper process control:
Optimized cutting speeds
Correct tool material and geometry
Adequate cooling and lubrication
Operations such as milling, turning, and drilling are commonly performed with high precision.
In terms of welding, 7075 T651 has limited weldability. Conventional welding methods are generally not recommended, and mechanical fastening or specialized welding techniques are preferred. For this reason, joining and assembly methods should be carefully considered during the design phase.
Corrosion Resistance Performance
Compared with some other aluminum alloys, 7075 T651 exhibits relatively low corrosion resistance. It performs well in dry or mildly aggressive environments but should receive additional surface protection-such as anodizing, painting, or special coatings-when exposed to seawater, high humidity, or aggressive chemicals.
With proper surface treatment, 7075 T651 becomes a reliable material for precision engineering and long-life structural components.
Standards and Specifications
7075 T651 aluminum supplied by GNEE can comply with a wide range of international standards, including:
Sheets and Plates
AMS QQ-A-250/12
AMS 4045
ASTM B209
Alclad Sheets
AMS QQ-A-250/12
ASTM B209
AMS 4049
Cold Drawn Bars and Flat Bars
AMS QQ-A-225/9
AMS 4123
ASTM B211
BS 2L95
AIR 9048-680
EN 2126
Extruded Tubes and Profiles
AMS 4168
AMS QQ-A-200/11
ASTM B221
EN 2394
EN 2631
Extruded Bars and Flat Bars
AMS 4168
AMS QQ-A-200/11
ASTM B221
EN 2394
EN 2631
Key Characteristics of 7075 T651 Aluminum
Strength: Excellent
Machinability: Very good
Weldability: Poor
Formability: Moderate
Corrosion resistance: Relatively low
Heat treatable: Yes
Typical Applications of 7075 T651 Aluminum
7075 T651 aluminum alloy is widely used in industries where strength, precision, and durability are critical, including:
Aerospace and space industry
Defense and military equipment
Automotive and high-performance vehicles
Injection molds and plastic molds
Rocket and missile systems
Heavy-duty machinery and industrial tooling
Stock Forms Available from GNEE
GNEE supplies 7075 T651 aluminum in multiple product forms to meet diverse application needs:
Sheet / Plate
Sheet
Bar / Rod
Custom sizes, cutting services, and technical support are available upon request.
Why Choose GNEE for 7075 T651 Aluminum
As a trusted Chinese aluminum manufacturer and supplier, GNEE is committed to providing high-homogeneity, stress-relieved 7075 T651 aluminum with consistent mechanical performance. Our products are suitable for both aerospace-grade requirements and demanding industrial applications.
By choosing GNEE, customers benefit from reliable quality, international standard compliance, and expert support for material selection and application optimization.
