Daxun Alloy's Pure Titanium Grade 1 Titanium Tubes Include:
Seamless titanium tubes and welded titanium tubes, which boast exceptional ductility and cold formability, making them ideal for deep drawing. Grade 1 titanium tubes are celebrated for their robust general and seawater corrosion resistance and superior resistance to oxidizing, neutral, and slightly reducing media (solutions, including chlorides).
With its low density (approximately half that of nickel-based alloys), high strength, lightweight nature, and outstanding corrosion resistance, titanium is an optimal choice for various challenging chemical environments. The 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)
This titanium tube is predominantly used in industrial applications, offering an excellent balance of moderate strength and reasonable ductility. Grade 2 titanium provides exceptional corrosion resistance in both highly oxidizing and slightly reducing conditions (including chlorides). This makes it ideal for providing corrosion protection in chemical and offshore industries, aircraft manufacturing where strength and formability are critical, as well as in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipelines.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard methods. It can be conveniently machined, though it necessitates sharp tools and the liberal application of coolant. Similar to machining austenitic stainless steels, deep and continuous cuts with slow feeds and speeds are recommended.
Stock Availability
Daxun Alloys maintains a robust stock of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes to meet diverse requirements.
Weight Reduction
CP 2 Grade Titanium Tubes feature a low density and a high strength-to-weight ratio, making them perfect for applications where weight reduction is essential without compromising on strength. These tubes are cold formable, exhibit good ductility, and can be welded using conventional TIG and MIG processes, although inert gas shielding is critical to prevent weld zone embrittlement.
Crystal Structure
At ambient temperature, ASTM B338 Grade 2 titanium tube exhibits an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. At approximately 885°C (1625°F), it transitions to a beta (body-centered cubic) structure. This transformation temperature can vary based on the type and amount of impurities or alloying additions. Alloying elements also split the single equilibrium transformation temperature into two zones: the alpha transformation zone, below which the alloy remains all alpha, and the beta transformation zone, above which it is all beta. Between these temperatures, both alpha and beta forms coexist. Typically, 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 are produced from hollow blanks via hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling steps. The seamless tubes should maintain continuous perimeters throughout the manufacturing stages. The comprehensive manufacturing of titanium seamless tubes encompasses: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling and piercing, degreasing, drying, cutting, online annealing and straightening, pickling, multiple cold rolling, degreasing, drying, vacuum annealing, straightening, cutting, pickling, final inspection, marking (DAXUN), 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 utilizing an advanced automatic arc welding (TIG) process. The meticulous production journey includes steps like: titanium plate uncoiling, shearing, 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. Post-formation and welding, each welded pipe undergoes at least one stress relief heat treatment. Daxun ensures no filler materials are used during the welding process to maintain purity and quality.
Ti-6Al-4V Titanium Pipe- Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) stands as the most sought-after titanium alloy, renowned for its duplex alpha+beta composition. Utilizing aluminum as the alpha stabilizer and vanadium as the beta stabilizer, this alloy boasts remarkable strength, even at temperatures as low as 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is optimized for annealing, solution treating, and aging. Applications span from compressor blades, disks, and rings for jet engines to fuselage and space capsule components, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and critical forgings, all benefitting from this alloy's exceptional strength-to-weight ratio.
Initially, the alloy undergoes vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting involves one or two steps of vacuum arc refining to achieve optimal purity and quality.
Specifications
• ASTM B338 - Standard for Heat Treatable Titanium Tubes
• AMS 4928 - Standards for Forgings and Forging Stock (Annealed)
• AMS 4965 - Specifications for Forgings (Solution Treated and Aged)
• AMS 4967 - Standards for 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: 1,830°F (±25°); 999°C (±14°)
Heat Treatment
Annealed at temperatures between 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 can undergo a variety of heat treatments to suit diverse requirements.
1. Annealing: Heat at 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Heat at 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, then air or furnace cool.
3. Solution Heat Treating: Heat at 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by a water quench.
4. Aging: Heat at 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, then air cool.
Optimum Properties
Achieving superior properties in small cross-sections through rapid quenching in the solution treated and aged condition. Larger sections or delayed quenching may yield suboptimal properties.
Hardness
In the annealed condition, the typical hardness ranges from Rockwell C 30-34, while in the solution treated and aged condition, it ranges from Rockwell C 35-39.
Forgeability/Formability
Experience the unparalleled quality of DAXUN Ti-6Al-4V Titanium Tube, Grade 5. Our premium titanium tube is expertly forged at an optimal temperature of 1,750°F (954°C) with a precise final forging temperature of 1,450°F (788°C). For outstanding performance, we recommend a reduction of at least 35%.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5, showcases exceptional durability and resilience. Even though it poses challenges to form at room temperature, significant bending or stretching can be achieved on the annealed tube at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical integrity. For optimal hot sizing or forming, creep forming is advisable at temperatures between 1,000°F to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, offers superior machinability akin to austenitic stainless steels. Employing slow speeds, high feeds, and robust tool rigidity, coupled with the use of abundant non-chlorinated cutting fluids, ensures precision and efficiency in every machining process.
Weldability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5, excels in weldability whether in its annealed or solution-treated and partially aged conditions. Aging can be seamlessly integrated through post-weld heat treatment, enhancing its structural integrity.
To achieve superior welds, precautions are essential to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding should be conducted in an inert gas environment or with an inert gas tail shield to protect molten and hot zones. Additionally, spot welding, seam welding, and flash welding can be performed effectively without requiring a protective atmosphere.
Special Considerations
Care must be taken to avoid hydrogen contamination during improper pickling and absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing processes. Such contamination can detrimentally affect ductility, notch sensitivity, and formability of the DAXUN Ti-6Al-4V Titanium Tube, Grade 5.
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