ASTM B381 Grade F-5 flanges are high-strength, corrosion resistant titanium flanges made from Ti-6Al-4V alloy (UNS R56400) . These flanges are widely used in oil & gas, chemical processing, marine, and aerospace industries due to their excellent strength-to-weight ratio, superior corrosion resistance, and high-temperature performance. Available in ASME B16.5 Titanium Grade 5 flanges standards, they include weld neck, slip-on, blind, and threaded types.
Introduction to ASTM B381 Titanium Grade 5 Flanges
ASTM B381 Titanium Grade 5 Flanges, also known as Ti-6Al-4V flanges, are among the most widely used titanium alloy flanges across critical industries. These flanges combine exceptional mechanical strength with outstanding corrosion resistance, making them suitable for demanding environments such as offshore platforms, chemical plants, and high-pressure systems.
We manufacture and supply ASTM B381 Grade F-5 flanges in compliance with international standards like ASME B16.5, ensuring dimensional accuracy, durability, and performance reliability. As one of the trusted Titanium Grade 5 flanges manufacturers in India and ASTM B381 titanium flange suppliers in USA, we serve both domestic and global markets with consistent quality.
Table of Contents
- ➤ Introduction to ASTM B381 Titanium Grade 5 Flanges
- ➤ What are ASTM B381 Grade F-5 Flanges?
- ➤ Key Product Types Available for Titanium Grade 5 Flanges
- ➤ ASTM B381 Titanium Grade 5 Flanges Specification
- ➤ Chemical Composition of ASTM B381 Gr 5 Flanges
- ➤ ASTM B381 Titanium Grade 5 Flanges Mechanical Properties
- ➤ Weight Chart of Titanium B381 Grade 5
- ➤ Manufacturing Process of ASTM B381 Grade 5 Flanges
- ➤ Why Choose Us as Your ASME B16.5 Titanium Grade 5 Flanges Supplier?
What are ASTM B381 Grade F-5 Flanges?
ASTM B381 Grade F-5 flanges are forged titanium alloy flanges made from Ti-6Al-4V material (UNS R56400). This alloy consists primarily of titanium, aluminum, and vanadium, offering a balance of strength, corrosion resistance, and lightweight properties.
These flanges are manufactured through forging processes to enhance grain structure and mechanical performance, making them ideal for high-pressure and high-temperature applications.
Key Product Types Available for Titanium Grade 5 Flanges
We supply a wide range of Titanium Grade 5 forged flanges, including:
- Titanium Grade 5 Weld Neck Flanges
- Slip-On Flanges
- Blind Flanges
- Threaded Flanges
- Socket Weld Flanges
- Lap Joint Flanges
Among these, Titanium Grade 5 Weld Neck Flanges are the most preferred for high-pressure pipelines due to their strong welded connection and stress distribution capability.
ASTM B381 Titanium Grade 5 Flanges Specification
| Specification | Details |
|---|---|
| ASTM Standard | ASTM B381 |
| Grade | Grade F-5 (Titanium Grade 5) |
| UNS Number | UNS R56400 |
| Size Range | ½” NB to 48” NB |
| Pressure Class | Class 150, 300, 600, 900, 1500 |
| Alloy | Ti-6Al-4V Flanges |
| Manufacturing | Forged |
| ASME Standard | ASME B16.5 Titanium Grade 5 Flanges |
Chemical Composition of B381 Titanium Grade 5 Flanges
| Element | Composition (%) |
|---|---|
| Titanium (Ti) | Balance |
| Iron (Fe) | Max 0.40 |
| Oxygen (O) | Max 0.20 |
| Nitrogen (N) | Max 0.05 |
| Carbon (C) | Max 0.08 |
| Aluminum (Al) | 5.5 – 6.75 |
| Vanadium (V) | 3.5 – 4.5 |
ASTM B381 Titanium Grade 5 Flanges Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 895 MPa (min) |
| Yield Strength | 828 MPa (min) |
| Elongation | 10% (min) |
| Hardness | 36 HRC (max) |
Weight Chart of Titanium B381 Grade 5
| Size (Inch) | weight (kg) |
|---|---|
| 1/2" | 1.2 |
| 1" | 2.1 |
| 2" | 4.5 |
| 4" | 10.8 |
| 6" | 18.5 |
Dimensions Table (ASME B16.5)
| Size | OD (mm) | Thickness (mm) | Bolt Circle (mm) |
|---|---|---|---|
| 1/2" | 95 | 11 | 66 |
| 1" | 117 | 13 | 79 |
| 2" | 152 | 16 | 120 |
| 4" | 229 | 24 | 191 |
| 6" | 279 | 26 | 241 |
Manufacturing Process of ASTM B381 Grade 5 Flanges
From our experience supplying ASTM B381 Gr 5 flanges globally, the manufacturing process plays a crucial role in performance:
- Raw material inspection (Ti-6Al-4V billets)
- Hot forging to refine grain structure
- Heat treatment for strength optimization
- CNC machining for precise dimensions
- Non-destructive testing (UT, PMI, RT)
- Final inspection and packaging
Related Titanium Flanges
- ASTM B381 Titanium Grade 1 Flanges
- ASTM B381 Titanium Grade 2 Flanges
- ASTM B381 Titanium Grade 7 Flanges
- ASTM B381 Titanium Grade 9 Flanges
- ASTM B381 Titanium Grade 12 Flanges
- ASTM B381 Titanium Grade 23 Flanges
Why Choose Us as Your ASME B16.5 Titanium Grade 5 Flanges Supplier?
- Trusted Titanium Grade 5 flanges manufacturers in India
- Reliable ASTM B381 titanium flange suppliers in USA
- Competitive pricing with consistent quality
- Ready stock and quick delivery
- Custom sizes and specifications available
Frequently Asked Questions
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