Daxun Alloy's Pure Titanium Grade 1 Titanium Tubes Include:
Seamless titanium tubes and welded titanium tubes, celebrated for their exceptional ductility and outstanding cold formability, making them perfect for deep drawing applications. Renowned for remarkable general and seawater corrosion resistance, Grade 1 titanium tubes also excel in resisting oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's remarkable low density (approximately half that of nickel-based alloys), combined with its superior strength, light weight, and exceptional corrosion resistance, make it an ideal choice for demanding chemical environments. Execution standards include: ASTM B338 | ASTM B265 | ASME SB265 | ASTM F67 | ISO 5832-2 | 3.7025 | UNS R50250.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
Widely regarded as the optimal choice for industrial applications, Grade 2 titanium tubes offer an excellent balance of moderate strength and reasonable ductility. They shine with superb corrosion resistance in both highly oxidizing and slightly reducing environments (including chlorides). Ideal for chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 is highly responsive to standard cold forming methods. While machining, it requires careful attention to maintaining sharp tools and generous coolant usage. Like machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a diverse inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes.
Weight Reduction
With a low density and high strength-to-weight ratio, CP 2 grade titanium tubes are perfect for applications demanding weight reduction without compromising strength. They are cold formable, possess excellent ductility, and can be welded using standard TIG and MIG processes, provided inert gas shielding is used to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes exhibit an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Around 885°C [1625°F], they transition to a beta (body-centered cubic) structure. This transformation temperature can vary based on impurities or alloying additions. Alloying elements also create two distinct temperature zones: the alpha transformation zone (below which the alloy is all alpha) and the beta transformation zone (above which the alloy is all beta). Typical alpha and beta transformation temperatures for Grade 2 titanium are 890°C (1635°F) and 913°C (1675°F), respectively.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes undergo a comprehensive manufacturing process, starting from hollow blanks created by hot extrusion or oblique rolling and piercing, followed by multiple cold rolling stages. The perimeter continuity is maintained throughout all manufacturing stages. This detailed process includes: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling with piercing, degreasing, drying, cutting, online annealing and straightening, pickling, multiple cold rolling, degreasing, drying, vacuum annealing, straightening, cutting, pickling, final inspection, DAXUN marking, and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium welded pipe is crafted from annealed flat-rolled steel plate or steel strip using the state-of-the-art automatic arc welding (TIG) process. The intricate production processes include: uncoiling and shearing titanium plates, butt welding, cleaning, pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing and sizing, straightening, eddy current testing, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. To ensure optimum quality, welded pipes undergo at least one stress relief heat treatment post forming and welding. Daxun does not incorporate any filler materials during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), is the pinnacle of titanium alloys. This duplex alpha+beta titanium alloy utilizes aluminum as the alpha stabilizer and vanadium as the beta stabilizer. The high-strength alloy is operable at low temperatures of around 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is perfect for annealing, solution treating, and aging. It finds critical applications in compressor blades, disks and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and high-strength-to-weight ratio forgings.
The alloy undergoes an initial melting process using vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM), followed by remelting in one or two vacuum arc stages to ensure supreme quality.
Specifications
• ASTM B338 - Standard Heat Treatable Titanium Tube
• AMS 4928 - Forgings and Forging Stock (Annealed)
• AMS 4965 - Forgings (Solution Treated and Aged)
• AMS 4967 - Forgings (Annealed, Heat Treatable)
Physical Properties
Ti-6Al-4V Titanium Tube Melting Range: 2,800-3,000°F (1,538 - 1,649°C)
Density: 0.160 lb/in3; 4.47 g/cm3
Beta Transus Temperature: 1830°F (± 25°); 999°C (± 14°)
Heat Treatment
Annealed at 1,700-1,900°F (927 - 1,038°C) to achieve high hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment methods.
1. Annealing: 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, followed by air or furnace cooling.
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by water quenching.
4. Aging: 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, followed by air cooling.
Optimum Properties
Smaller cross-sections subjected to rapid quenching achieve optimal properties in the solution-treated and aged condition. Larger cross-section sizes or delayed quenching may result in properties that are less than optimal.
Hardness
Typical hardness in the annealed condition ranges from Rockwell C 30-34 and approximately Rockwell C 35-39 in the solution-treated and aged condition.
Forgeability/Formability
Experience the superior craftsmanship of DAXUN Ti-6Al-4V Titanium Tube, Grade 5. This exceptional alloy is forged at an optimum 1,750°F (954°C), with a final forging temperature ensuring strength at 1,450°F (788°C). For best results, a reduction of at least 35% is recommended, unlocking unparalleled performance.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5, presents unique challenges in forming at room temperature. Even when annealed, severe forming operations like bending or stretching are best performed at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical integrity. The process of creep forming, utilized for hot sizing or forming, is most effective at temperatures between 1,000 to 1,200°F (538 to 649°C).
Machinability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5, can be efficiently machined using techniques suited for austenitic stainless steels. Employ slow speeds, high feeds, and ensure superior tool rigidity, complemented by generous amounts of non-chlorinated cutting fluids to achieve precision and excellence.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube Grade 5 demonstrates exceptional weldability in both annealed and solution and partially aged conditions. It reaches optimal performance when aging is accomplished during post-weld heat treatment. Care must be taken to prevent contamination by oxygen, nitrogen, and hydrogen.
Utilize fusion welding in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones for best results. Spot welding, seam welding, and flash welding can all be seamlessly executed without the need for a protective atmosphere, ensuring a robust and reliable weld.
Special Considerations
DAXUN Ti-6Al-4V Titanium Tube, Grade 5, requires diligent prevention of hydrogen contamination from improper pickling and the absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing processes. Such contamination can significantly reduce ductility and impair notch sensitivity and formability, necessitating careful handling and treatment.
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