Daxun Alloy's pure titanium Grade 1 titanium tubes include:
seamless titanium tubes and welded titanium tubes, which have excellent ductility and cold formability. They are ideal for deep drawing. Grade 1 titanium tubes are renowned for their superior general and seawater corrosion resistance, as well as their exceptional resistance to 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 remarkable corrosion resistance, make it a premium choice for various 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)
This is the most commonly used titanium tube for industrial applications, offering a superb balance of moderate strength and reasonable ductility. It provides extraordinary corrosion resistance in both highly oxidizing and slightly reducing environments, including chlorides. It serves as an excellent safeguard against corrosion in the chemical and offshore industries, as well as in aircraft manufacturing where strength and formability are critical. Additionally, it's used in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 responds optimally to cold forming using conventional methods. It can be readily machined, but it is essential to maintain sharp tools and use liberal amounts of coolant. Similar to machining austenitic stainless steels, cuts should be deep and continuous, with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains an extensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes.
Weight Reduction
CP 2 grade titanium tubes boast low density and a high strength-to-weight ratio, making them perfect for applications demanding weight reduction without compromising strength. They are cold formable, possess good ductility, and can be welded using conventional TIG and MIG processes, provided inert gas shielding is used to prevent embrittlement of 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. At approximately 885°C (1625°F), it transforms into a beta (body-centered cubic) structure. This transformation temperature can vary with the type and amount of impurities or alloying additions. The addition of alloying elements divides the single equilibrium transformation temperature into two zones: the alpha transformation zone, below which the alloy is all alpha, and the beta transformation zone, above which it is all beta. Between these temperatures, both alpha and beta forms coexist. The 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 produced from hollow blanks via hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling stages. Throughout all manufacturing stages, titanium seamless tubes should maintain continuous perimeters. The detailed manufacturing process includes: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling plus 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 meticulously crafted from annealed flat-rolled steel plate or steel strip through an advanced automatic arc welding (TIG) process. The comprehensive production sequence encompasses: 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. Notably, the welded pipes undergo at least one stress relief heat treatment post-forming and welding, ensuring optimal durability. Daxun employs various filler materials during the welding process to enhance structural integrity and performance.
Ti-6Al-4V Titanium Pipe - Premium Grade 5 Titanium TubeTitanium Alloy - (UNS R56400), renowned for its superior performance and versatility.
Introduction
DAXUN's Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), is the pinnacle of titanium alloys. This duplex alpha+beta titanium alloy incorporates aluminum as the alpha stabilizer and vanadium as the beta stabilizer, offering exceptional strength. Capable of withstanding low temperatures down to approximately 800°F (427°C), ATI Ti-6Al-4V, Grade 5 alloy is the preferred choice for annealing, solution treating, and aging. Its applications are vast, including compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners, and critical forgings, all benefitting from its high strength-to-weight ratio.
The alloy's initial melting is conducted using state-of-the-art vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM) techniques. Subsequent remelting is achieved through one or two vacuum arc steps, ensuring superior purity and uniformity.
Specifications
• ASTM B338 - Standard Heat Treatable Titanium Tube, meeting the rigors of industrial standards.
• AMS 4928 - Forgings and Forging Stock (Annealed), ensuring optimal mechanical properties.
• AMS 4965 - Forgings (Solution Treated and Aged) for enhanced strength and durability.
• AMS 4967 - Forgings (Annealed, Heat Treatable), providing flexibility in thermal processing.
Physical PropertiesTi-6Al-4V Titanium Tube Melting Range: 2,800-3,000°F (1,538 - 1,649°C), an impressive thermal performance.
Density: 0.160 lb/in3; 4.47 g/cm3, offering an excellent strength-to-weight ratio.
Beta Transus Temperature: 1830°F (± 25°); 999°C (± 14°), critical for phase transition control.
Heat Treatment For applications requiring high hardness, tensile strength, and fatigue resistance, the alloy is annealed at 1,700-1,900°F (927 - 1,038°C).
DAXUN 6-4 Grade 5 Titanium Tube is versatile in its heat treatment options.
1. Annealing: Conducted at 1,275 -1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling to achieve desired mechanical properties.
2. Stress Relief Annealing: Performed at 1,000 -1,200°F (538 - 649°C) for 1 to 8 hours, then air or furnace cooled to relieve residual stresses.
3. Solution Heat Treating: Executed at 1,675 -1,750°F (913 - 954°C) for 1 hour, followed by a water quench to enhance strength.
4. Aging: Conducted at 975 -1,025°F (524 - 552°C) for 4 to 8 hours, then air cooled to achieve peak properties.
Optimum Properties Small cross-sections with rapid quenching attain superior properties in the solution-treated and aged condition. Larger sections or delayed quenching may yield suboptimal properties.
HardnessIn the annealed condition, typical hardness ranges from Rockwell C 30-34. In the solution-treated and aged condition, hardness increases to approximately Rockwell C 35-39.
Forgeability/Formability Introducing the DAXUN Ti-6Al-4V Titanium Tube, a Grade 5 marvel designed for exceptional performance. This titanium tube is skillfully forged at a precise temperature of 1,750°F (954°C), with the final forging taking place at 1,450°F (788°C) to ensure optimal quality. For superior results, a reduction of no less than 35% is recommended.
Crafted for challenging conditions, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, presents a formidable challenge to form at room temperature, even when annealed. Advanced forming techniques, such as bending or stretching, can be executed on the annealed material at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical properties. Additionally, creep forming at 1,000 to 1,200°F (538 to 649°C) can be utilized for precise hot sizing or forming.
Machinability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, offers exceptional machinability using techniques designed for austenitic stainless steels. Employ slow speeds and high feeds, ensure robust tool rigidity, and apply generous amounts of non-chlorinated cutting fluids to achieve precision results.
Weldability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, exhibits excellent weldability whether in annealed, solution-treated, or partially aged conditions. Effective aging can be achieved during post-weld heat treatment.
To maintain the integrity of the DAXUN Ti-6Al-4V Grade 5 Titanium Tube, preventive measures must be taken to avoid contamination from oxygen, nitrogen, and hydrogen. Fusion welding is best performed in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot areas. Techniques such as spot welding, seam welding, and flash welding can be performed without the necessity for a protective atmosphere.
Special Considerations Attention to detail is crucial when working with the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube. Improper pickling or the absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing can lead to hydrogen contamination. Such contamination may diminish ductility and negatively impact notch sensitivity and formability.
