ASTM B381 Gr F5 Weld Neck Flange Gr 5 Titanium Flange ASME B16.5
We are a professional manufacturer of ASTM B381 Gr F5 Weld Neck Flange Gr 5 Titanium Flange ASME B16.5 in China.
ASTM B381 Gr F5 refers to a grade of titanium alloy specified for forged products, including flanges. Grade F5 under ASTM B381 typically relates to titanium Grade 5 (Ti-6Al-4V), a widely used titanium alloy with enhanced strength and high performance compared to commercially pure titanium.
Grade F-5—UNS R56400. Titanium alloy (6 % aluminum, 4 % vanadium),
Grades: Titanium alloy Grade5(Ti-6Al-4V)
Size: 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Class: 150#, 300#, 825#, 900#, 1500# & 2500#
Flange type: Blind, Threaded, Socket welding, Slip-on, Lapped (lap joint), Weld neck
Face type: Flat Face, Raised Face, Male and Female Face, Tongue and Groove Face, Ring Joint Face
Gr5 Titanium flange Equivalent Material
| Type | ASTM | JIS | GOST | DIN | GB |
| Ti-6Al-4V | UNS R56400 | TAP6400 | BT6 | 3.7105 | TC4 |
Gr5 Titanium flange Chemical Composition, %, Max
| C | Fe | H | N | O | V | Al | Ti |
| 0.08 | 0.30 | 0.015 | 0.05 | 0.2 | 3.5-4.5 | 5.5-6.75 | BALANCE |
Gr5 Titanium flange Mechanical Properties
| Tensile strength, min | Yield strength, 0.2% offset, min, Mpa | Elongation at Break, % | Hardness |
| 895 MPa | 825 MPa | 10 | 330-390 HV |
Applications of ASTM B381 Gr F5 Flanges
- Aerospace and Defense: Used in aircraft components, spacecraft structures, and military applications.
- Chemical Processing: Ideal for applications requiring resistance to aggressive chemicals and elevated temperatures.
- Marine Applications: Suitable for seawater environments, including offshore platforms and ship components.
- Power Generation: High-performance flanges for gas and steam turbines.
FlangeTypes Available in ASTM B381 Gr F5
- Weld Neck Flanges: For high-pressure, high-temperature systems.
- Slip-On Flanges: Easy to install, used in low-pressure systems.
- Blind Flanges: For sealing pipe ends or vessel openings.
- Socket Weld Flanges: For small-diameter, high-pressure pipes.
- Threaded Flanges: For non-welded applications.
- Lap Joint Flanges: Paired with stub ends for systems requiring frequent disassembly.
Comparison between B381 Gr F 2 and Gr F5
| Property | Grade 2 (Ti CP) | Grade F5 (Ti-6Al-4V) |
|---|---|---|
| Strength | Lower (345 MPa tensile) | Higher (895 MPa tensile) |
| Corrosion Resistance | Excellent | Very good |
| Density | 4.51 g/cm³ | 4.43 g/cm³ |
