Daxun Alloy's pure titanium Grade 1 titanium tubes include:
seamless titanium tubes and welded titanium tubes, which have outstanding ductility and cold formability. These tubes are exceptionally suited for deep drawing processes. Renowned for their impressive general and seawater corrosion resistance, Grade 1 titanium tubes also exhibit remarkable resilience against oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's low density (approximately half that of nickel-based alloys), combined with its high strength, light weight, and superior corrosion resistance, positions it as an exceptional choice for various demanding chemical environments. Applicable 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)
The most commonly used titanium tube for industrial applications, Grade 2 titanium offers a perfect balance of moderate strength and outstanding ductility. It provides excellent corrosion resistance in both highly oxidizing and mildly reducing conditions, including chlorides. This makes it an ideal choice for the chemical and offshore industries, as well as aircraft manufacturing, where strength and formability are crucial. Additionally, it is utilized in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping.
Fabrication
Titanium Grade 2 effectively responds to cold forming using conventional methods. It can be easily machined, though special care must be taken to maintain sharp tools and use ample coolant. Similar to machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a robust inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes.
Weight Reduction
CP 2 grade titanium tubes, known for their low density and high strength-to-weight ratio, are ideal for applications requiring weight reduction without compromising strength. They are cold formable, possess good ductility, and can be welded using standard TIG and MIG processes. However, inert gas shielding is necessary to prevent embrittlement in the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube features an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. Around 885°C (1625°F), it transitions to a beta (body-centered cubic) structure. This transformation temperature can fluctuate depending on the type and amount of impurities or alloying additions. Alloying elements also create two temperature zones: the alpha transformation zone, where the alloy remains all alpha, and the beta transformation zone, where the alloy is all beta. Between these zones, both alpha and beta forms coexist. 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 are crafted from hollow blanks through a hot extrusion process or an oblique rolling and piercing process, followed by multiple cold rolling processes. These seamless tubes maintain continuous perimeters throughout the manufacturing stages. The comprehensive production 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, final inspection, marking (DAXUN), and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium welded pipe is a masterpiece of engineering, meticulously crafted from annealed flat-rolled steel plate or steel strip using the state-of-the-art automatic arc welding (TIG) process. This comprehensive production journey encompasses several sophisticated steps: titanium plate uncoiling, precision shearing, butt welding, meticulous 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, and a final meticulous inspection before packaging. To ensure the utmost quality, welded pipes undergo at least one stress relief heat treatment post-formation and welding. Remarkably, Daxun does not employ any filler materials during the welding process, guaranteeing the purity and integrity of each pipe.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) stands as the pinnacle of titanium alloys. This renowned duplex alpha+beta alloy is fortified with aluminum as an alpha stabilizer and vanadium as a beta stabilizer. Known for its exceptional strength, this alloy performs flawlessly even at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is extensively utilized for annealing, solution treating, and aging, making it indispensable for a diverse array of applications: 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 demanding a superior strength-to-weight ratio.
This extraordinary alloy is initially created through advanced techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). The remelting process involves one or two additional vacuum arc steps to achieve perfect consistency and 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
For applications requiring high hardness, tensile strength, and fatigue strength, annealing is conducted at temperatures between 1,700-1,900°F (927 - 1,038°C).
The DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to meet specific requirements.
1. Annealing: At temperatures between 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Conducted at 1,000 - 1,200°F (538 - 649°C) for periods ranging from 1 to 8 hours, then air or furnace cooled.
3. Solution Heat Treating: Performed at 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by a water quench.
4. Aging: Carried out at 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, then air cooled.
Optimum Properties
Optimal properties are achieved in small cross sections with rapid quenching during the solution-treated and aged condition. For larger cross-section sizes or delayed quenching, properties may not be as ideal.
Hardness
In the annealed condition, the typical hardness ranges from Rockwell C 30-34, while in the solution-treated and aged condition, it reaches approximately Rockwell C 35-39.
Forgeability/Formability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, is expertly forged at 1,750°F (954°C) with a final forging temperature set at 1,450°F (788°C). For paramount results, a reduction of at least 35% is highly recommended.
When it comes to formability, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, presents challenges at room temperature, even post annealing. Consequently, intense forming operations such as bending or stretching are best performed on the annealed material at elevated temperatures up to 1,200°F (649°C) without compromising mechanical properties. Moreover, creep forming is a viable method for hot sizing or forming, effective within the temperature range of 1,000 to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, can be machined efficiently using techniques suited for austenitic stainless steels. Employing slow speeds, high feeds, robust tool rigidity, and substantial amounts of non-chlorinated cutting fluids is essential for optimal machining.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, offers excellent weldability in both annealed and solution and partially aged conditions. Aging can be achieved during post-weld heat treatment.
To ensure top-notch weld quality, precautions must be taken to prevent contamination by oxygen, nitrogen, and hydrogen. Fusion welding should be performed in an inert gas-filled chamber or with an inert gas tail shield protecting the molten metal and adjacent hot zones. Additionally, spot welding, seam welding, and flash welding can be executed without requiring a protective atmosphere.
Special Considerations
Attention must be given to the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, as it may be susceptible to hydrogen contamination from improper pickling and absorption of oxygen, nitrogen, and carbon during various processes such as forging, heat treating, and brazing. Such contamination can potentially reduce ductility and negatively impact notch sensitivity and formability.
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