ASTM B 338 ASTM B 861 Titanium grade 7 tubes / pipes 6.000 - 12.200 mm Titanium Alloy Tube
Introduction of Titanium Tube Grade 7:
Titanium Grade 7, also known as Ti-0.15Pd, is a corrosion-resistant grade of titanium that offers enhanced resistance to reducing acids and localized attack. Here's an introduction to Titanium Grade 7 tubes:
Composition:
- Titanium (Ti): Balance (major constituent)
- Palladium (Pd): 0.12% - 0.25%
- Other Elements: Small amounts of iron (Fe), oxygen (O), carbon (C), nitrogen (N), and hydrogen (H), typically in trace quantities.
Properties:
- Corrosion Resistance: Grade 7 titanium exhibits excellent resistance to corrosion in oxidizing and mildly reducing environments.
- Mechanical Strength: It has good strength properties and is capable of withstanding moderate pressures and temperatures.
- Fabricability: Grade 7 titanium is readily formable and weldable, making it suitable for various fabrication processes.
Grade 7 Titanium Tube Specifications:
| Working material: | 3.7164 / 3.7165 (Ti 6AI 4V) |
| Thicknesses: | 0,89 - 5,49 mm |
| Diameter: | 13,7 - 60,3 mm |
| Lengths: | 6.000 - 12.200 mm |
| Versions: | Seamless, longitudinally welded, drawn |
| Surfaces: | Bright |
| Standards: | ASTM B 338, ASTM B 861, VD TÜV BL. 230/3 |
Different Grades of Titanium:
Excellent Corrosion Resistance:
Grade 2 titanium exhibits outstanding resistance to corrosion, including in environments ranging from mildly reducing to highly oxidizing. This property is crucial for applications exposed to corrosive chemicals, seawater, and industrial atmospheres.
High Strength-to-Weight Ratio:
Titanium is known for its exceptional strength-to-weight ratio, making Grade 2 titanium seamless tubes strong yet lightweight. This characteristic is particularly beneficial in aerospace and marine applications where weight savings are critical without compromising structural integrity.
Superior Formability and Fabrication:
Grade 2 titanium seamless tubes are highly formable, allowing for easy fabrication into complex shapes and configurations. This property simplifies manufacturing processes and reduces production costs compared to other materials that may require more extensive shaping processes.
Biocompatibility:
Titanium is biocompatible, meaning it is non-toxic and well-tolerated by the human body. Grade 2 titanium seamless tubes are thus widely used in medical implants, such as surgical instruments, joint replacements, and dental applications, where compatibility with bodily tissues is essential.
Excellent Weldability:
Grade 2 titanium seamless tubes exhibit good weldability using common welding techniques such as TIG (GTAW) and electron beam welding (EBW). This facilitates easy joining and integration into larger systems or assemblies without compromising the material's integrity.
Long-Term Durability:
Titanium has a high resistance to fatigue and erosion, ensuring long-term durability even under challenging operating conditions. This characteristic makes Grade 2 titanium seamless tubes suitable for critical applications where reliability and maintenance-free operation are paramount.
Wide Range of Applications:
Due to its combination of properties—corrosion resistance, strength, lightweight, and biocompatibility—Grade 2 titanium seamless tubes find applications across diverse industries. These include aerospace, chemical processing, oil and gas, marine, medical, and even sporting goods where high performance and reliability are required.
Chemical Composition of ASME SB338 Ti Gr 7 Seamless Pipe:
| Element | Composition Range (%) |
| Titanium (Ti) | Remainder (balance) |
| Palladium (Pd) | 0.12 - 0.25 |
| Iron (Fe) | ≤ 0.30 |
| Oxygen (O) | ≤ 0.25 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.03 |
| Hydrogen (H) | ≤ 0.015 |
| Other Elements | ≤ 0.10 each, ≤ 0.40 total |
Advantages of Titanium Grade 7:
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Superior Corrosion Resistance: Offers better corrosion resistance in reducing and mildly oxidizing environments compared to commercially pure titanium.
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Biocompatibility: Suitable for medical implants and surgical instruments.
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High Strength-to-Weight Ratio: Provides strength comparable to steel but with approximately half the weight.
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Longevity: Resistant to degradation in harsh environmental conditions, ensuring long service life.
Applications of Titanium Seamless Tubes:
Aerospace Industry:
- Airframes and Components: Titanium seamless tubes are used in aircraft structures, landing gear, and hydraulic systems due to their high strength-to-weight ratio, corrosion resistance, and ability to withstand high temperatures.
Chemical Processing:
- Corrosion-resistant Piping: Titanium tubes are utilized in chemical processing plants for transporting corrosive chemicals and fluids. They offer superior resistance to a wide range of corrosive environments, including acids and chlorides.
Medical and Healthcare:
- Implants and Surgical Instruments: Grade 2 titanium tubes are biocompatible and resistant to corrosion within the human body, making them ideal for medical implants such as bone screws, joint replacements, and dental implants.
Marine Industry:
- Seawater Applications: Titanium seamless tubes are used in desalination plants, shipbuilding, and offshore oil platforms due to their resistance to corrosion from seawater and saltwater environments.
Power Generation:
- Heat Exchangers: Titanium tubes are employed in power plants for heat exchangers and condensers. Their excellent thermal conductivity and corrosion resistance enhance efficiency and reliability.
Automotive Industry:
- Exhaust Systems: High-performance vehicles utilize titanium seamless tubes in exhaust systems due to their lightweight properties, high strength, and resistance to corrosion from exhaust gases.
Sports and Recreation:
- Bicycle Frames: Titanium tubes are favored in high-end bicycle frames for their strength, durability, and light weight, offering performance advantages over traditional materials.
Oil and Gas Industry:
- Subsea Applications: Titanium tubes are used in oil and gas exploration and production for subsea pipelines and components, where corrosion resistance and reliability are critical.
Electronics and Semiconductor Manufacturing:
- Vacuum Systems: Titanium tubes are used in vacuum environments and semiconductor manufacturing processes due to their clean surface, low outgassing properties, and resistance to contamination.
Architecture and Construction:
- Structural Applications: Titanium tubes are occasionally used in architectural projects and structural applications where corrosion resistance and aesthetic appeal are desired.
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ASTM B 338 ASTM B 861 Titanium Ti Grade 7 Tubes / Pipes 6.000 - 12.200 Mm Titanium Alloy Tube Images
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