ASTM B209 7075-T651 Aluminum Plate Aerospace Grade

 

 

Our 7075-T651 Aluminum Plate is a high-strength heat-treated aluminum alloy plate designed for applications requiring a high strength-to-weight ratio, good dimensional stability, and reliable machining performance. It is commonly selected for aerospace structures, precision-machined components, tooling, transportation equipment, and other demanding engineering applications.
7075 aluminum alloy is a zinc-based high-strength aluminum alloy, with zinc and magnesium as its primary alloying elements and copper as an important strengthening element. The T651 temper combines solution heat treatment, artificial aging, and controlled stretching for stress relief. This treatment helps reduce residual stress and improves dimensional stability during machining.
Our 7075-T651 aluminum plates can be supplied in standard or custom dimensions, with cut-to-size service available for specific thickness, width, and length requirements.

 

 

Item	Specification
Material	7075 Aluminum Alloy
Temper	T651
Product	Aluminum Plate
Standard	ASTM B209
Grade	7075
Thickness	6–150 mm
Width	1000–2500 mm
Length	2000–6000 mm
Standard Size	1000 × 2000 mm, 1220 × 2440 mm, 1500 × 3000 mm, 2000 × 4000 mm
Surface	Mill Finish
Processing	Saw Cutting / Cut to Size
Flatness	According to ASTM B209
Thickness Tolerance	According to ASTM B209
Width Tolerance	According to ASTM B209
Length Tolerance	According to ASTM B209
Heat Treatment	Solution Heat Treated + Stress Relieved + Artificially Aged
Density	Approx. 2.81 g/cm³
Elastic Modulus	Approx. 71.7 GPa
Certification	Mill Test Certificate (MTC) Available
Custom Size	Available
Cut-to-Size	Available

 

 

 

Element	Composition (wt. %)
Aluminum (Al)	Balance
Zinc (Zn)	5.1–6.1
Magnesium (Mg)	2.1–2.9
Copper (Cu)	1.2–2.0
Chromium (Cr)	0.18–0.28
Silicon (Si)	≤ 0.40
Iron (Fe)	≤ 0.50
Manganese (Mn)	≤ 0.30
Titanium (Ti)	≤ 0.20
Other Elements, Each	≤ 0.05
Other Elements, Total	≤ 0.15

 

 

7075-T651 aluminum plate is a high-strength heat-treated aluminum alloy known for its excellent strength-to-weight ratio. The T651 temper includes solution heat treatment, controlled stretching for stress relief, and artificial aging, providing improved dimensional stability for precision machining and structural applications.
 

Mechanical Property	Typical / Minimum Value
Tensile Strength	≥ 572 MPa
Yield Strength	≥ 503 MPa
Elongation	≥ 8–11%
Hardness	Approx. 150 HB
Elastic Modulus	Approx. 71.7 GPa
Shear Strength	Approx. 331 MPa
Poisson's Ratio	Approx. 0.33
Density	Approx. 2.81 g/cm³
Melting Range	Approx. 477–635°C

 

 

The T651 temper designation identifies a specific heat-treatment and stress-relief condition for 7075 aluminum plate.

The basic treatment sequence includes:

Solution Heat Treatment → Controlled Stretching for Stress Relief → Artificial Aging

The controlled stretching process is important for reducing residual internal stresses that can remain after solution heat treatment.

Compared with a conventional T6 condition, T651 is particularly useful when dimensional stability during machining is important.

Why Choose T651 for Aluminum Plate?

Reduced residual stress

Better dimensional stability

Lower risk of machining distortion

Suitable for thick aluminum plate

Good choice for precision CNC machining

Suitable for aerospace and engineering components
 

 

7075-T6 and 7075-T651 are both high-strength tempers of 7075 aluminum alloy. Their basic alloy chemistry is the same, but the main difference is the stress-relieving treatment used for the T651 temper.
 

Property	7075-T6 Aluminum Plate	7075-T651 Aluminum Plate
Alloy	7075	7075
Temper	T6	T651
Solution Heat Treated	Yes	Yes
Artificially Aged	Yes	Yes
Stress Relief by Stretching	No	Yes
Residual Stress	Higher	Lower
Dimensional Stability	Good	Improved
Machining Distortion	More likely	Reduced
Machining Performance	Good	Better for precision machining
Strength Level	High	High
Typical Application	High-strength components	Aerospace & precision-machined components

 

 

We supply 7075-T651 aluminum plate in a wide range of thicknesses, widths, and lengths for aerospace, precision machining, tooling, and high-strength structural applications. Standard stock sizes and custom dimensions are available according to customer requirements.

7075-T651 Aluminum Plate Size Chart

Thickness	Width	Length
6.3–12.5 mm	1000–2500 mm	2000–6000 mm
12.5–25 mm	1000–2500 mm	2000–6000 mm
25–50 mm	1000–2500 mm	2000–6000 mm
50–60 mm	1000–2500 mm	2000–6000 mm
60–80 mm	1000–2500 mm	2000–6000 mm
80–90 mm	1000–2500 mm	2000–6000 mm
90–100 mm	1000–2500 mm	2000–6000 mm
100–150 mm	Custom	Custom

 

 

Our 7075-T651 aluminum plate is supplied according to applicable dimensional requirements of ASTM B209. Thickness, width, length, flatness, squareness, and lateral bow are controlled according to the applicable aluminum product dimensional tolerance standard.

Because permissible tolerances vary according to plate thickness and ordered dimensions, the final tolerance should be confirmed with the applicable specification and purchase order.
 

 

7075-T651 aluminum plate is typically supplied with a mill finish produced during the rolling process. The surface is generally smooth and uniform, with the natural metallic appearance of rolled aluminum. The exact surface appearance may vary depending on plate thickness, rolling conditions, and subsequent processing.

Surface Finish Options

Surface / Processing	Description
Mill Finish	Standard rolled aluminum surface with a natural metallic appearance
Saw Cut Surface	Cut surface produced during plate cutting; suitable for further machining
Machined Surface	Surface processed by CNC machining or other precision machining methods
Brushed Surface	Directional brushed appearance available for specific applications upon request
Custom Surface	Special surface requirements can be discussed before production

 

 

 

1. High Strength: 7075T651 aluminum alloy has very high tensile and yield strengths, making it one of the strongest aluminum alloys. Its tensile strength typically ranges from 540 to 560 MPa.

2. Good Fatigue Strength: This alloy exhibits good fatigue strength, making it suitable for applications subject to repeated loads.

3. Excellent Machinability: 7075T651 exhibits good machinability and is easily processed by machining processes such as turning and milling.

4. Poor Corrosion Resistance: Compared to other aluminum alloys (such as 6061 alloy), 7075 alloy exhibits relatively poor corrosion resistance. Therefore, anti-corrosion treatments such as anodizing or surface coating are typically required for use in corrosive environments.

5. Good Wear Resistance: Heat treatment significantly improves the hardness and wear resistance of 7075T651.

6. Heat treatment performance: 7075T651 obtains extremely high strength through heat treatment (T6 quenching and artificial aging). The T651 state is stress-relieved by stretching to prevent material deformation.

 

Due to its excellent strength and lightweight properties, 7075T651 aluminum alloy thick plate is widely used in applications requiring high strength and hardness, including but not limited to:

1. Aerospace Industry: Primarily used in the manufacture of aircraft wings, fuselages, structural components, and helicopter rotors.

2. Military Equipment: Suitable for the manufacture of lightweight weapons and armor, as well as structural components for other military vehicles and equipment.

3. Mold Manufacturing: Due to its high strength and machinability, 7075T651 aluminum alloy is often used in the production of high-precision molds, such as injection molds and die-casting molds.

4. High-Performance Sporting Goods: Suitable for racing cars, mountain bikes, skateboards, and other sports equipment requiring both strength and lightweight.

5. Other Industrial Applications: These include high-strength frames, machine parts, bridge structures, and pressure vessels.

 

7075T651 aluminum alloy thick plate is widely used in demanding engineering fields due to its strength, hardness, and fatigue performance. However, due to its weak corrosion resistance, protective measures must be used in some special environments.If you have any related needs, please contact us immediately.
 

 

q1. What is 7075-T651 aluminum plate?

A: 7075-T651 is a high-strength heat-treated aluminum alloy plate. The T651 temper includes solution heat treatment, stress relief through controlled stretching, and artificial aging.

q2. Is 7075-T651 an aerospace-grade aluminum alloy?

A: 7075 is widely used for high-strength aerospace and engineering applications. The exact aerospace specification and certification requirements should be confirmed according to the intended application.

q3. What standard covers 7075 aluminum plate?

A: ASTM B209 covers aluminum and aluminum-alloy sheet and plate products, including applicable 7075 alloy products.

q4. What is the difference between 7075-T6 and 7075-T651?

A: Both provide high strength, but T651 includes an additional stress-relieving treatment. This can provide better dimensional stability and reduce distortion during machining.

q5. Is 7075-T651 suitable for CNC machining?

A: Yes. Its high strength and stress-relieved condition make 7075-T651 a popular choice for precision-machined components. Machining parameters should be selected according to the component design and tooling requirements.

q6. What sizes of 7075-T651 aluminum plate are available?

A: Standard and custom sizes can be supplied. Thickness, width, and length depend on production capability and stock availability. Custom cutting is available upon request.

q7. Can you cut 7075-T651 aluminum plate to size?

A: Yes. We can provide cut-to-size plates according to the required thickness, width, and length.

Q8. Do you provide an MTC for 7075-T651 aluminum plate?

A: Yes. A Mill Test Certificate and relevant material documentation can be provided according to order and certification requirements.

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