Aluminium Alloy Plate 6061-T6 is one of the world's most widely used heat-treatable aluminum alloys. It combines excellent strength, corrosion resistance, weldability, and machinability, making it suitable for aerospace, marine, transportation, construction, machinery, and precision engineering applications. Compared with many conventional aluminum alloys, 6061-T6 provides an outstanding balance between mechanical performance and fabrication capability.

The T6 temper indicates that the material has been solution heat-treated and artificially aged to achieve its optimum mechanical properties. As a result, 6061 aluminum plate offers significantly higher strength than non-heat-treated alloys such as 1050 or 3003 while maintaining good corrosion resistance and excellent machining performance.

Whether you are looking for aluminum 6061 T6 plates, comparing 6061-T6 and 6061-T651, or searching for the latest aluminum 6061 T6 price per kg, this guide explains everything you need to know before purchasing.

1. What Is Aluminium Alloy Plate 6061-T6?

6061-T6 is a precipitation-hardened aluminum-magnesium-silicon alloy belonging to the 6xxx series. It is recognized worldwide for its high strength-to-weight ratio, excellent corrosion resistance, and outstanding versatility. The alloy is commonly supplied in plate, sheet, bar, extrusion, tube, and structural profiles.

Because of its excellent mechanical properties, 6061-T6 aluminum is widely used for CNC machining, welded structures, molds, automation equipment, truck bodies, railway vehicles, pressure vessels, marine components, and aerospace parts. It also performs well after anodizing, producing an attractive and durable surface finish.

Compared with high-strength alloys such as 7075, 6061-T6 offers better weldability and corrosion resistance. Compared with softer alloys such as 5052 or 3003, it provides significantly higher tensile strength and rigidity, making it one of the most versatile engineering aluminum alloys available today.

2. Chemical Composition of 6061-T6 Aluminum Alloy

The excellent performance of Aluminium Alloy Plate 6061-T6 comes from its balanced chemical composition. Magnesium and silicon combine to form magnesium silicide (Mg₂Si), which allows the alloy to respond effectively to heat treatment. Copper contributes to higher strength, while chromium improves corrosion resistance and helps control grain structure during processing.

This optimized composition gives 6061 aluminum plate excellent mechanical strength while maintaining good weldability, corrosion resistance, and dimensional stability after machining.

3. Mechanical Properties of Aluminium Alloy Plate 6061-T6

One of the main reasons why Aluminium Alloy Plate 6061-T6 is widely selected for engineering applications is its excellent combination of strength, toughness, and lightweight characteristics. After solution heat treatment and artificial aging (T6 temper), the alloy develops high mechanical strength while maintaining good dimensional stability and fatigue resistance.

Compared with common non-heat-treatable alloys, 6061-T6 offers significantly higher yield strength and hardness, making it ideal for structural components, machine bases, transportation equipment, molds, and precision machined parts.

These properties make 6061-T6 one of the preferred engineering aluminum alloys where weight reduction and structural strength are equally important.

4. 6061-T6 vs 6061-T651

Many buyers compare 6061-T6 with 6061-T651 before placing an order. Both tempers have nearly identical chemical composition and mechanical properties. The main difference is that 6061-T651 has been stretch stress-relieved after heat treatment, which significantly reduces internal residual stress and improves dimensional stability during machining.

For general fabrication, welding, and structural applications, 6061-T6 performs exceptionally well. However, for precision CNC machining, mold manufacturing, and thick plates, 6061-T651 is usually recommended because it minimizes distortion during machining.

If your project requires high dimensional accuracy after extensive CNC machining, aluminum alloy plate 6061-T651 is generally the preferred option. For most structural and fabrication applications, standard 6061-T6 aluminum plate remains the most economical and widely available choice.

5. 6061-T6 Aluminum Plate Specifications

To meet different industrial requirements, 6061-T6 aluminum plates are available in a wide range of thicknesses, widths, and lengths. Most manufacturers also provide customized dimensions, precision cutting, and surface processing according to customer drawings.

6. Available Sizes & Thickness of 6061-T6 Aluminum Plate

6061 aluminum plate is available in a wide range of standard and custom dimensions to meet the needs of different industries. Thin plates are commonly used for precision components and decorative applications, while medium and thick plates are preferred for structural engineering, mold manufacturing, marine equipment, and heavy machinery.

Large-format plates help reduce welding and fabrication costs, while precision-cut plates improve machining efficiency and minimize material waste. Most manufacturers also provide saw cutting, CNC cutting, milling, drilling, and PVC protective film according to customer requirements.

Choosing the appropriate thickness depends on load requirements, machining allowance, and fabrication methods. For CNC machining, many customers prefer thicker 6061-T651 aluminum plates because they offer improved dimensional stability after stress relief.

7. Applications of Aluminium Alloy Plate 6061-T6

Because of its excellent balance of strength, corrosion resistance, weldability, and machinability, Aluminium Alloy Plate 6061-T6 is used in almost every industrial sector. It performs exceptionally well in applications requiring lightweight structural materials with reliable long-term performance.

Its versatility makes 6061 aluminum plate one of the most frequently specified engineering aluminum materials worldwide. Whether used in heavy equipment or precision instruments, the alloy provides consistent performance and long service life.

8. Advantages of Aluminium Alloy Plate 6061-T6

Compared with many other aluminum alloys, 6061-T6 aluminum plate offers a unique combination of mechanical strength, corrosion resistance, fabrication flexibility, and cost-effectiveness. These advantages make it a preferred material for engineers, manufacturers, and OEM companies around the world.

• Excellent strength-to-weight ratio
• Outstanding corrosion resistance in industrial and marine environments
• Excellent CNC machining performance
• Good weldability using conventional welding methods
• Easy anodizing for decorative and protective finishes
• Available in T4, T6, and T651 tempers
• Wide range of standard and custom sizes
• Suitable for structural, marine, transportation, and aerospace applications
• Competitive cost compared with many high-strength aluminum alloys

These advantages explain why 6061-T6 aluminum remains one of the most popular engineering materials for projects requiring lightweight construction and reliable mechanical performance.

9. Aluminum 6061-T6 Price Per KG

Many buyers searching for aluminum 6061 T6 price per kg expect a fixed quotation. In reality, the price of Aluminium Alloy Plate 6061-T6 changes according to aluminum ingot prices, alloy surcharge, plate thickness, dimensions, temper, processing requirements, and order quantity. Therefore, quotations should always be based on the latest raw material market and the customer's technical specifications.

Additional services such as precision sawing, CNC machining, surface protection film, anodizing, or custom packaging may also affect the final cost. For export orders, freight terms (FOB, CFR, or CIF) and destination country should also be considered when requesting a quotation.

To receive an accurate quotation, buyers are encouraged to provide alloy, temper, thickness, width, length, quantity, destination port, and any machining requirements. Complete information enables manufacturers to offer the most competitive pricing and the shortest production lead time.

10. How to Choose the Right 6061-T6 Aluminum Plate

Selecting the appropriate 6061 aluminum plate depends on your application, machining requirements, and service environment. Choosing the correct temper, dimensions, and processing options can improve manufacturing efficiency while reducing material waste and production costs.

• Select T6 for general structural fabrication and welded components.
• Select T651 for CNC machining, mold manufacturing, and precision equipment requiring minimal internal stress.
• Choose plate thickness according to load-bearing requirements and machining allowance.
• Specify applicable standards such as ASTM B209 or EN 485 when required.
• Request PE or PVC protective film if the surface must remain free from scratches during transportation and processing.
• Purchase directly from an experienced manufacturer to ensure consistent quality, reliable delivery, and competitive pricing.

11. Why Choose Our Aluminium Alloy Plate 6061-T6

We specialize in supplying premium-quality Aluminium Alloy Plate 6061-T6 for customers worldwide. Our production facilities are equipped with advanced rolling, heat treatment, leveling, cutting, and quality inspection equipment to ensure every plate meets international standards.

• Complete range of 6061-T6 and 6061-T651 aluminum plates
• Thickness from 6 mm to 300 mm
• Maximum width up to 2650 mm
• Precision cutting and CNC processing services
• ASTM, EN, and GB standard production
• Strict quality inspection before shipment
• Factory-direct pricing with stable supply capacity
• Professional export packaging for global delivery
• Technical support and fast quotation response

Whether your project involves aerospace, marine engineering, transportation, industrial machinery, or mold manufacturing, we can provide reliable 6061 aluminum plate solutions tailored to your requirements.

12. Frequently Asked Questions (FAQ)

What is Aluminium Alloy Plate 6061-T6?

6061-T6 is a heat-treated aluminum alloy known for its high strength, excellent corrosion resistance, good weldability, and outstanding machinability. It is widely used in aerospace, transportation, marine engineering, machinery, and industrial manufacturing.

What is the difference between 6061-T6 and 6061-T651?

Both tempers have similar mechanical properties. The main difference is that 6061-T651 has undergone stress-relief stretching after heat treatment, making it more suitable for precision machining and reducing deformation during CNC processing.

What is 6061-T6 aluminum used for?

6061-T6 aluminum is commonly used for aircraft components, marine structures, truck bodies, railway vehicles, automation equipment, molds, machine parts, structural frames, and precision engineering applications.

How much does aluminum 6061-T6 cost per kg?

The price depends on aluminum ingot market prices, temper, plate dimensions, processing requirements, and purchase quantity. Contact the manufacturer with your specifications for an accurate quotation.

Can 6061-T6 aluminum plate be welded?

Yes. 6061-T6 offers good weldability using common welding methods such as TIG and MIG welding. However, welding may reduce strength in the heat-affected zone, and post-weld heat treatment may be required for critical structural applications.