Aluminium Alloy 6061 Weld Neck Flanges Manufacturer – ASTM B247 6061-T6 Flanges Supplier
Looking for high-quality Aluminium Alloy 6061 Weld Neck Flanges? We are a trusted manufacturer and global exporter of 6061-T6 aluminum flanges, conforming to ASTM B247 (SB247) standards. These flanges are widely used in aerospace, marine, structural, and chemical processing industries due to their excellent strength-to-weight ratio, corrosion resistance, and good weldability.
Aluminum Alloy 6061 Weld Neck Flange is a widely used high-strength, corrosion-resistant forged flange manufactured from heat-treatable aluminum-magnesium-silicon alloy. The long tapered neck provides excellent reinforcement for high-pressure piping systems and minimizes stress concentration at the flange-to-pipe connection.
Aluminium 6061-T6 Weld Neck Flange Specification
- Material: Aluminium Alloy 6061 in heat-treated T6 temper
- Standard: ASTM B247 / ASME SB247
- Type: Weld Neck Flanges (WNRF)
- Size Range: 1/2” to 24”
- Pressure Rating: Class 150, 300, 600
- Finish: Smooth, serrated, or custom machined faces
- Certification: EN 10204 3.1, NDT, and dimensional reports on request
ASTM B247-20 Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings
TABLE 1 Chemical Composition Limits of 6061 T6 according to ASTM B247
| Alloy | Silicon | Iron | Copper | Manganese | Magnesium | Chromium | Nickel | Zinc | Titanium | Zirconium | Other Elements | Other Elements | Aluminium, min |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6061 | 0.40 – 0.8 | 0.7 | 0.15 – 0.40 | 0.15 | 0.8 – 1.2 | 0.04 – 0.35 | … | 0.25 | 0.15 | … | 0.05 | 0.15 | rem. |
Why Choose our 6061-T6 Aluminium Flanges?
- High strength and lightweight – ideal for load-bearing applications
- Excellent resistance to corrosion, seawater, and chemicals
- T6 temper ensures increased mechanical properties
- Suitable for welding, machining, and forming
Applications of 6061 Weld Neck Flanges:
- Piping systems in chemical plants and refineries
- Marine and offshore structural components
- Aerospace hydraulic systems
- Lightweight pressure vessels and tanks
- Architectural and structural framework
We provide custom sizes, special machining, and coating options based on your project specifications. Our Aluminum 6061 Weld Neck Flanges are exported to the USA, Europe, Middle East, and Southeast Asia with timely delivery and competitive pricing.
Order Information
To request a quotation, please provide:
- Size (DN / NPS)
- Pressure class (150 / 300 / PN16 / PN25…)
- Facing type (RF / FF)
- Quantity
- Drawings (if customized)
- Any special heat treatment or testing requirement
⬇️ Download ASTM B247-20 Latest Edition Standard Now (PDF)
Related Products:
Aluminum 6061 Blind Flange | 6061-T6 Slip On Flange | 6061 T6 Pipes| 6061 T6 Couplings| 6061 T6 Pipe|6061 Coupling
