ASTM B381 Grade 2 and Grade 5 Titanium Flanges Long Weld Neck Flange Raised Face Titanium for Piping and Industrial Applications

Chemical Composition of Titanium Pipe Flanges:

Here's the detailed chemical composition of the two commonly used titanium grades, Grade 2 and Grade 5, in the context of titanium pipe flanges:

Grade 2 (Commercially Pure Titanium) has a high purity level of titanium, with only minimal amounts of carbon, iron, hydrogen, and oxygen. It is an unalloyed titanium grade and is widely used in general industrial applications.

Grade 5 (Ti-6Al-4V) contains a mixture of titanium, aluminum, and vanadium. This alloy offers significantly higher strength and improved performance compared to Grade 2, making it ideal for aerospace, marine, and high-performance applications.

Mechanical Properties of ASTM B381 Titanium Plate Flanges:

The mechanical properties of titanium alloys are crucial when choosing materials for flanges, as they determine the material's strength, performance under pressure, and durability. Below are the properties of Titanium Grade 2 and Titanium Grade 5:

Key Differences in Mechanical Properties:

Density: Grade 2 is slightly denser than Grade 5, but the difference is minimal and generally not a significant factor in most applications.

Melting Point: Grade 2 has a slightly higher melting point than Grade 5, which indicates its ability to withstand slightly higher temperatures before melting.

Tensile Strength: Grade 5 has significantly higher tensile strength (138,000 psi or 950 MPa) compared to Grade 2 (49,900 psi or 344 MPa). This makes Grade 5 much more suitable for high-stress applications.

Yield Strength: Grade 5 also has higher yield strength (128,000 psi or 880 MPa), which is important for maintaining structural integrity under load, especially in aerospace and military applications.

Elongation: Grade 2 has a higher elongation (20%) compared to Grade 5 (14%), meaning Grade 2 is more ductile and can stretch more before breaking, which is valuable in forming processes.

Comparing Titanium Grades for Long Weld Neck Flanges:

Conclusion:

• Titanium Grade 7 Long Weld Neck Flanges are ideal for corrosive environments, especially those involving acids and chemicals. They're commonly used in chemical processing, marine, and aerospace applications.
• Titanium Grade 9 Long Weld Neck Flanges are perfect for applications requiring a high strength-to-weight ratio, such as in aerospace, military, and marine environments. They provide excellent durability and reliability under stress.
• Titanium Grade 11 Long Weld Neck Flanges excel in high-temperature applications where oxidation resistance is a must. They're commonly used in power generation, chemical processing, and aerospace industries, particularly in environments subject to elevated temperatures.

Each of these titanium alloys offers distinct advantages, and selecting the right material depends on the specific demands of the application, including factors such as corrosion resistance, strength, temperature tolerance, and weldability.