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Small Diameter Seamless Titanium Tubing
Material
Small diameter seamless titanium tubing is manufactured using high-quality titanium alloy materials, known for their exceptional strength, corrosion resistance, and lightweight properties. Titanium alloys commonly used for tubing production include Grade 2 (Ti-CP), Grade 5 (Ti-6Al-4V), and Grade 9 (Ti-3Al-2.5V).
Specification
Small diameter seamless titanium tubing typically conforms to ASTM B338/ASME SB338 standards. These specifications ensure uniformity in dimensions, mechanical properties, and chemical composition, meeting stringent industry requirements.
Key Features
Exceptional corrosion resistance
High strength-to-weight ratio
Excellent biocompatibility
Superior fatigue resistance
Low thermal expansion coefficient
Non-magnetic
Chemical Composition
| Alloy Grade | Chemical Composition (%) |
| Grade 2 | Ti: ≥ 99.2, Fe: ≤ 0.30, O: ≤ 0.25, C: ≤ 0.10, N: ≤ 0.03 |
| Grade 5 | Ti: ≥ 90.0, Al: 5.5-6.75, V: 3.5-4.5, O: ≤ 0.20, C: ≤ 0.08 |
| Grade 9 | Ti: ≥ 90.0, Al: 2.5-3.5, V: 2.0-3.0, O: ≤ 0.15, C: ≤ 0.05 |
Mechanical Properties
| Alloy Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) |
| Grade 2 | ≥ 345 | ≥ 275 | ≥ 20 | ≤ 170 |
| Grade 5 | ≥ 895 | ≥ 828 | ≥ 10 | ≤ 334 |
| Grade 9 | ≥ 620 | ≥ 483 | ≥ 15 | ≤ 235 |
Physical Properties
| Property | Value |
| Density (g/cm³) | 4.51 (Grade 2), 4.43 (Grade 5), 4.48 (Grade 9) |
| Melting Point (°C) | 1668 |
| Thermal Conductivity (W/m·K) | 20.9 (Grade 2), 6.7 (Grade 5), 19.6 (Grade 9) |
| Specific Heat (J/g·K) | 0.52 (Grade 2), 0.54 (Grade 5), 0.54 (Grade 9) |
Process Performance
| Performance Parameter | Value |
| Weldability | Good |
| Machinability | Fair to Good |
| Formability | Excellent |
| Corrosion Resistance | Exceptional |
Steel Grade
Small diameter seamless titanium tubing is commonly available in various grades, including Grade 2, Grade 5, and Grade 9, each offering specific properties suitable for different applications.
Application
Small diameter seamless titanium tubing finds applications in various industries due to its unique combination of properties. Common applications include:
Aerospace components
Medical implants and instruments
Chemical processing equipment
Marine structures
Sports equipment
Automotive exhaust systems
Possible Alternative Grades
While Grade 2, Grade 5, and Grade 9 are the most common titanium alloys used for small diameter seamless tubing, alternative grades such as Grade 7 (Ti-0.15Pd) and Grade 12 (Ti-0.3Mo-0.8Ni) may be suitable for specific applications requiring enhanced corrosion resistance or elevated temperature properties.
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