6061 T651 aluminum plate is a versatile aluminum alloy sheet and one of the most widely used heat-treatable aluminum alloys.It offers an excellent balance of high mechanical strength, strong corrosion resistance, and good machinability, making it suitable for a wide range of industrial applications.
After solution heat treatment and artificial aging, the material undergoes a pre-stretching process. This step effectively reduces internal residual stress within the crystal structure. As a result, the plate maintains stable dimensions and shape during machining and is less likely to deform.
Thanks to its high stability and precision performance, 6061 T651 plate is widely used in high-precision mold manufacturing and other applications that require tight tolerances and reliable machining accuracy.
Advantages of 6061 T651 Aluminum Plate
Balanced Strength and High Toughness
6061 T651 aluminum plate has a low density and weighs only about 30% of steel. Despite its light weight, it provides reliable mechanical strength and good toughness. This balance makes it suitable for structural and load-bearing applications where weight reduction is important.
Excellent Corrosion Resistance
The alloy forms a stable protective oxide layer on the surface. It can resist corrosion from seawater, humidity, and many acidic or alkaline environments. Its stable chemical composition also gives it good weather resistance for long-term use.
Outstanding Machinability
The 6061-T651 aluminum plate supports milling, drilling, turning, and other precision machining processes. The T651 temper includes stress-relief stretching, which reduces internal residual stress. This helps prevent deformation during high-precision machining, making it an ideal material for mold and tooling applications.
Good Weldability and Heat Treatment Compatibility
This alloy is suitable for common welding methods such as TIG and MIG welding, producing stable and reliable weld joints. It also supports anodizing treatment, which improves surface hardness, corrosion resistance, and overall surface appearance.
Overall, 6061 T651 plate combines strength, stability, and processing flexibility, making it a preferred choice for precision manufacturing and industrial applications.
6061 T651 Aluminum Plate Specifications
| Name |
6061 T65 aluminum sheet & plate |
| Temper |
T651 |
| Thickness |
6 mm – 300 mm |
| Width |
1000 – 2500 mm |
| Length |
2000 – 6000 mm |
| Standard |
ASTM B209 / AMS 4027 |
| Surface Treatment |
Mill Finish, Anodized, Polished, Brushed, PVC Protective Film |
| MOQ |
2 TON |
6061 T651 Aluminum Plate Properties
| Tensile Strength |
≥ 290 MPa (≥ 42 ksi) |
| Yield Strength (0.2% Offset) |
≥ 240 MPa (≥ 35 ksi) |
| Elongation |
8 – 17 % |
| Brinell Hardness |
~ 95 HB |
| Elastic Modulus |
~ 69 GPa |
| Shear Strength |
~ 207 MPa |
| Fatigue Strength |
~ 96 MPa |
Applications of 6061 T651 Aluminum Plate
6061-T651 aluminum plate is widely used across many industries due to its balanced mechanical performance, excellent machinability, and strong corrosion resistance. It is especially suitable for applications that require high stability and precision.
Aerospace Components
This alloy is commonly used for structural plates, mounting brackets, and base plates in aerospace applications. Its high strength-to-weight ratio helps reduce overall weight while maintaining structural reliability.
Marine and Shipbuilding Parts
6061-T651 aluminum plate is used for hull panels, structural frames, and marine fittings. Its good resistance to seawater corrosion ensures long service life in marine environments.
Mechanical Structures and Frames
In industrial equipment, it is often applied to large structural components, support frames, and mold base plates. The stress-relieved T651 temper helps maintain dimensional stability during machining.
Precision Machining and Mold Manufacturing
Thanks to low internal stress and excellent cutting performance, 6061-T651 aluminum plate is ideal for tool plates, precision-machined parts, and mold components where tight tolerances are required.
Overall, 6061-T651 aluminum plate is a reliable and versatile material choice for high-precision, structural, and industrial applications.
