The 1/4 inch aluminum plate 6061-T651 is one of the most popular grades of aluminum plate used in engineering, aerospace, and industrial fabrication. It offers excellent strength, machinability, and corrosion resistance while remaining lightweight and easy to process.
Manufactured to ASTM B209 standards, this plate provides uniform thickness, smooth surface finish, and dimensional stability, ideal for applications requiring high strength-to-weight ratio.
Key Specifications
| Property | Specification |
|---|---|
| Alloy | 6061 |
| Temper | T651 |
| Thickness | 1/4 inch (6.35 mm) |
| Width | 48″ (1219 mm) |
| Length | 96″ (2438 mm) or custom |
| Standard | ASTM B209 |
| Finish | Mill Finish / Brushed / Anodized |
| Density | 2.7 g/cm³ |
| Yield Strength | 35,000 psi |
| Tensile Strength | 45,000 psi |
| Hardness | Brinell 95 HB |
| Machinability | Excellent |
What Does 6061-T651 Mean?
Each part of the alloy and temper code tells you something important:
| Code | Meaning | Description |
|---|---|---|
| 6061 | Alloy Type | Aluminum-magnesium-silicon alloy |
| T6 | Heat Treatment | Solution heat-treated and artificially aged |
| T651 | Stress Relieved | Stretched after heat treatment to remove internal stress |
Result: Improved flatness, better dimensional control, and higher stability during machining.
Features of 1/4″ Aluminum Plate 6061-T651
- High strength with excellent stiffness-to-weight ratio
- Outstanding corrosion resistance in marine and industrial environments
- Good weldability and machinability
- Uniform mechanical properties across the plate
- Suitable for precision machining and structural fabrication
Common Applications
The 1/4″ 6061-T651 aluminum plate is used in a wide range of industries:
| Industry | Typical Application |
|---|---|
| Aerospace | Aircraft frames, support brackets |
| Marine | Boat hulls, decks, and structural panels |
| Automotive | Chassis plates, performance parts |
| Construction | Architectural panels, load-bearing plates |
| Machinery | Tooling, jigs, fixtures, and machine bases |
| Defense | Armor plating, protective covers |
Comparison with Other Aluminum Alloys
| Alloy | Strength | Corrosion Resistance | Weldability | Common Use |
|---|---|---|---|---|
| 3003 | Medium | Excellent | Good | HVAC, kitchen equipment |
| 5052 | High | Excellent | Excellent | Marine, fuel tanks |
| 6061-T651 | Very High | Very Good | Excellent | Aerospace, structure |
| 7075 | Extremely High | Moderate | Fair | Aircraft, defense |
6061-T651 is the best balance between strength, corrosion resistance, and machinability, making it ideal for general-purpose structural use.
Dimensional Options Available
| Thickness (inch) | Width (inch) | Length (inch) | Approx. Weight (kg/m²) |
|---|---|---|---|
| 1/8″ (3.18 mm) | 48 | 96 | 8.6 |
| 1/4″ (6.35 mm) | 48 | 96 | 17.1 |
| 3/8″ (9.5 mm) | 48 | 96 | 25.6 |
| 1/2″ (12.7 mm) | 48 | 96 | 34.2 |
Custom sizes and precision-cut plates are available upon request.
ASTM B209 Compliance
The ASTM B209 standard ensures that aluminum plates meet strict chemical and mechanical property requirements.
| Property | Requirement (6061-T651) | Test Method |
|---|---|---|
| Chemical Composition | Al-Mg-Si alloy | ASTM E1251 |
| Mechanical Strength | ≥ 45,000 psi | ASTM E8 |
| Hardness | ≥ 95 HB | ASTM E10 |
| Flatness Tolerance | ≤ 0.5 mm per meter | ASTM B209 |
Every plate is certified with mill test reports for traceability and quality assurance.
Cutting and Fabrication Options
1/4 inch 6061-T651 aluminum plates can be cut, machined, or formed easily using:
- CNC machining and routing
- Laser and waterjet cutting
- Drilling and tapping
- TIG and MIG welding
Worthwill Aluminum offers custom-cut services based on your drawing or CAD file.
Pricing and Supply Information
| Quantity | Price per Kg (USD) | Lead Time |
|---|---|---|
| Sample Order | $3.60–$3.90 | 3–5 days |
| Bulk (500+ kg) | $3.20–$3.50 | 7–10 days |
| Customized Order | Based on specs | Negotiable |
Prices may vary with LME aluminum market and order volume.
Packaging & Delivery
Each 6061-T651 aluminum plate is carefully packed to prevent surface damage:
- PVC film or kraft paper interleaf
- Wooden pallet or steel crate
- Moisture-proof wrapping for export
Shipping options: Air freight, sea container, or express delivery.
Why Choose Worthwill Aluminum?
- Factory-direct manufacturing under ISO 9001
- Strict ASTM B209 compliance
- Fast turnaround on cut-to-size orders
- Technical support for structural and machining projects
- Global export experience and stable pricing
1/4″ Aluminum Plate 6061
The 1/4″ Aluminum Plate 6061-T651 ASTM B209 is a high-quality, precision-engineered material that delivers strength, machinability, and long-term performance for industrial, marine, and aerospace use.
If you’re searching for a reliable supplier of 6061-T651 aluminum plates, Worthwill Aluminum provides top-grade materials, competitive pricing, and professional service worldwide.
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