7075-T651 Aircraft & Industrial Aluminum Plate
7075-T651 is a high-strength 7-series aluminum alloy. The T651 temper indicates solution aging with post-stretching stress relief, which effectively reduces machining deformation. We supply 7075-T651 plates complying with ASTM B209, and available to AMS-QQ-A-250/12 / AMS 4045 upon request, it is widely used for aerospace structures, mould manufacturing, precision CNC machining, tooling, and other high-strength engineering applications. Full mill test certificates (MTC) with complete chemical composition and mechanical property test data are available for all batches. Do not confuse it with ASTM B211, a standard solely for aluminum bars, rods and wires.
Chemical Composition of 7075 Aluminum Alloy
| Element | Content (%) |
|---|---|
| Zinc (Zn) | 5.6 – 6.1 |
| Magnesium (Mg) | 2.1 – 2.5 |
| Copper (Cu) | 1.2 – 1.6 |
| Chromium (Cr) | 0.18 – 0.28 |
| Iron (Fe) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | ≤ 0.30 |
| Titanium (Ti) | ≤ 0.20 |
| Aluminum (Al) | Balance |
Mechanical Properties of 7075 T651 Aluminum Plate
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) |
|---|---|---|
| >1.50 – 3.00 | ≥545 | ≥475 |
| >3.00 – 6.00 | ≥545 | ≥475 |
| >6.00 – 12.50 | ≥540 | ≥470 |
| >12.50 – 25.00 | ≥540 | ≥470 |
| >25.00 – 50.00 | ≥530 | ≥460 |
| >50.00 – 60.00 | ≥525 | ≥440 |
| >60.00 – 80.00 | ≥495 | ≥420 |
| >80.00 – 90.00 | ≥490 | ≥390 |
| >90.00 – 100.00 | ≥460 | ≥360 |
| >100.00 – 120.00 | ≥410 | ≥300 |
| >120.00 – 150.00 | ≥360 | ≥260 |
| >150.00 – 203.00 | ≥360 | ≥240 |
Certification & Testing
Mill Test Certificate (EN 10204 3.1) available
Chemical composition and mechanical testing per applicable ASTM / AMS standards
Third-party inspection supported upon request
7075 T651 Plate Stock Size(OEM Size Available)
| Alloy | Temper | Thickness (mm) | Width (mm) × Length (mm) |
|---|---|---|---|
| 7075 | T651 | 10 / 12 / 15 / 16 / 18 / 22 / 28 / 50 / 60 / 70 / 75 / 80 / 85 / 90 / 95 / 100 / 105 / 110 / 120 / 130 / 150 / 160 / 180 / 190 | 1000 x 3000 1500 × 3000 2000 × 4000 |
7075-T651 vs 7075-T6511
Although both tempers are stress-relieved after solution heat treatment and artificial aging, 7075-T651 and 7075-T6511 are designed for different product forms and manufacturing processes.
| Feature | 7075-T651 | 7075-T6511 |
|---|---|---|
| Typical Product Form | Plate | Extruded Bar, Rod & Profile |
| Manufacturing Process | Rolled Plate | Extrusion |
| Stress Relief | Stretched | Stretched after extrusion |
| Dimensional Straightness | Standard | Improved straightness for bars |
| Machinability | Excellent | Excellent |
| Common Applications | Aerospace plates, moulds, structural parts | CNC shafts, precision rods, machine components |
| ASTM Standard | ASTM B209 | ASTM B221 |
Applications of 7075-T651 Aircraft Aluminum Plate
7075-T651 aluminum plate is widely used in precision-machined, high-strength structural components, especially in industries where dimensional stability, strength, and reliability are critical.
1. Machined Aircraft Structural Components
Due to its stress-relieved condition, 7075-T651 is ideal for large-scale CNC machining. It is commonly used for:
Aircraft frames
Bulkheads
Structural ribs
Load-bearing brackets
The reduced internal stress ensures minimal deformation during heavy material removal, maintaining tight tolerances throughout machining.
2. Thick Plate Parts with Complex Geometry
7075-T651 performs exceptionally well in applications requiring:
Deep pocket machining
Multi-axis CNC processing
Complex structural geometries
Its uniform mechanical properties across thick sections make it suitable for high-precision aerospace components where consistency is critical.
3. High Load-Bearing Structural Parts
With strength levels comparable to some steels, 7075-T651 is widely used in:
Primary aircraft structures
Secondary support components
High-stress mechanical parts
It enables engineers to achieve high strength-to-weight ratio designs, which is essential in aerospace and high-performance engineering.
4. Precision Components Requiring Dimensional Stability
Because of its stress-relieved temper, 7075-T651 is preferred for parts that require:
Tight dimensional tolerances
High repeatability in machining
Minimal warping or distortion
Typical applications include:
Aerospace fittings
Precision mounts
Structural connectors
5. Replacement for 7075-T6 in Machined Parts
While 7075-T6 offers similar strength, 7075-T651 is more suitable for:
Precision-machined components
Large aluminum plate parts
Applications where post-machining deformation must be minimized
It is commonly selected as a more reliable material option for critical machined structures.
