Are you tired of aluminum plates warping, bending, or deforming during heavy CNC machining? Material instability wastes your tooling time and ruins your finished parts.
At GNEE, we supply premium 6061-T651 aluminum alloy plates specifically manufactured to solve this problem. Our plates are permanently stress-relieved, ensuring extreme flatness and zero distortion during milling and cutting.
Stop gambling with cheap, unstable materials. Send us your thickness, width, and quantity requirements today. Click "Inquiry Now" to get a competitive factory quote within 2 hours!
What Makes 6061-T651 Aluminum Plate Different?
For precision engineering, standard tempers are not enough. The "T651" temper means the 6061 aluminum plate has been solution heat-treated, naturally aged, and most importantly, stress-relieved by stretching (1.5% to 3% permanent set).
This stretching process removes internal residual stress. When you buy 6061-T651 aluminum plates from GNEE, you can mill away up to 80% of the material thickness, and the plate will remain perfectly flat without curling or warping.
Standard Specifications of GNEE 6061-T651 Aluminum Plate
We keep a large inventory of standard sizes and offer custom precision cutting.
| Specification | Details |
| Alloy & Temper | 6061-T651 |
| Standard | ASTM B209, EN 485 |
| Thickness | 6.0 mm – 400 mm (1/4 inch to 16 inches) |
| Width | 1000 mm – 2200 mm |
| Length | Up to 6000 mm |
| Surface Finish | Mill finish (Clean, no deep scratches) |
| Testing | 100% Ultrasonic Tested (No internal defects) |
6061-T6 vs. 6061-T651 Aluminum Plate: Which Do You Need?
Buyers often get confused between T6 and T651. Here is the direct answer:
6061-T6: Has high internal stress. If you machine it heavily, it will release stress and deform. It is only suitable for simple structural uses where no precision machining is required.
6061-T651: Has zero internal stress. It is specifically designed for CNC machining, mold making, and precision jigs. If your project involves CNC milling, always choose 6061-T651.
Chemical Composition of 6061-T651 Aluminum Plate
To ensure consistent anodizing performance and welding capability, GNEE strictly controls the chemical makeup of our 6061-T651 aluminum plates.
| Alloy | Mg | Si | Cu | Cr | Fe | Zn | Mn | Ti | Al |
| 6061 | 0.8 - 1.2 | 0.4 - 0.8 | 0.15 - 0.4 | 0.04 - 0.35 | ≤ 0.7 | ≤ 0.25 | ≤ 0.15 | ≤ 0.15 | Remainder |
Mechanical Properties of 6061-T651 Aluminum Plate
Our plates deliver reliable strength, making them ideal for high-stress applications.
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| T651 | ≥ 290 | ≥ 240 | ≥ 8 | ~ 95 |
What Are the Main Applications of 6061-T651 Aluminum Plate?
Thanks to its excellent machinability, strength-to-weight ratio, and good corrosion resistance, 6061-T651 is the backbone of modern manufacturing:
- Precision Machining: CNC machined parts, aerospace fixtures, and semiconductor equipment components.
- Tooling & Molding: Injection molds, blow molds, and precision jigs.
- Automation: Base plates, structural frames, and robotic arms.
- Automotive: Engine components and high-strength chassis parts.
How Does GNEE Solve Your 6061-T651 Aluminum Plate Sourcing Problems?
As a direct supplier, GNEE focuses on the technical details that matter to engineers and purchasing managers:
- No Internal Defects: Thick plates often suffer from porosity. We perform strict ultrasonic testing (UT) on our 6061-T651 aluminum plates. We guarantee no blisters or cracks, ensuring you don't discover a defect halfway through expensive machining.
- Excellent Flatness & Tolerances: We use advanced precision saws and leveling machines. You get tight thickness tolerances and excellent flatness, reducing your surface preparation time.
- Perfect Anodizing Results: By strictly controlling trace elements, our plates guarantee uniform color and thickness when hard-anodized after machining.
- Secure Sea-Freight Packaging: We pack all plates on fumigated wooden pallets with moisture-proof wrapping, ensuring the surface is protected from sea salt oxidation during transit.
Ready to Order Your 6061-T651 Aluminum Plate?
Do not compromise your machining process with inferior materials. GNEE provides certified, stress-relieved, and ready-to-machine aluminum plates tailored to your production schedule.
Need custom cut-to-size blocks or full standard plates? Email us your dimensions now! Click the "Contact Us" button below, and our technical sales team will provide a comprehensive quote and shipping details today.