Daxun Alloy's unrivaled pure titanium Grade 1 titanium tubes include:
seamless titanium tubes and welded titanium tubes, offering superior ductility and cold formability. These tubes are perfect for deep drawing and are celebrated for their outstanding general and seawater corrosion resistance. They excel against oxidizing, neutral, and slightly reducing media, including solutions with chlorides.
Titanium's remarkable properties-low density (approximately half that of nickel-based alloys), high strength, lightweight, and corrosion resistance-make it ideal 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)
This titanium grade is the industry standard for numerous applications, delivering an exceptional balance of moderate strength and ductility. Its superb corrosion resistance in both highly oxidizing and slightly reducing environments, including chlorides, makes it indispensable in chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, and CPI equipment.
Fabrication
Titanium Grade 2 is highly responsive to cold forming with standard techniques. It is easily machined, although maintaining sharp tools and liberal use of coolant is crucial. Similar to machining austenitic stainless steels, it requires deep, continuous cuts 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 feature low density and an excellent strength-to-weight ratio, making them ideal for applications demanding weight reduction without compromising strength. They offer good ductility, can be cold-formed, and are weldable using standard TIG and MIG processes, provided that inert gas shielding is used to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube boasts an alpha (hexagonal close-packed) crystal structure, similar to commercially pure grades 1 and 3. Upon reaching approximately 885°C (1625°F), it transforms into a beta (body-centered cubic) structure. The transformation temperature can vary with the type and amount of impurities or alloying elements. Alloying elements also create two temperature zones: the alpha transformation zone (all alpha) and the beta transformation zone (all beta). Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) for alpha and 913°C (1675°F) for beta.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's state-of-the-art ASTM B338 Grade 2 titanium seamless tubes are crafted from hollow blanks using hot extrusion or oblique rolling and piercing, followed by multiple cold rolling stages. These processes ensure continuous perimeters at all manufacturing stages. Key steps include: sponge titanium vacuum arc melting, ingot blanking to hollow blanks, cleaning, cutting, feeding, hot extrusion or oblique rolling and piercing, degreasing, drying, cutting, online annealing, 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 utilizing the advanced TIG (automatic arc welding) process. The extensive production sequence includes: titanium plate uncoiling, shearing, butt welding, rigorous cleaning, precision pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing and sizing, straightening, secondary eddy current testing, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. Each welded pipe undergoes at least one stress relief heat treatment post-forming and welding. Notably, Daxun employs filler materials during the welding process to ensure impeccable quality.
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 premier choice among titanium alloys. This duplex alpha+beta titanium alloy, fortified with aluminum as the alpha stabilizer and vanadium as the beta stabilizer, boasts exceptional high-strength properties, operational even at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is adept for annealing, solution treating, and aging, serving a multitude of critical applications: compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** casings; helicopter rotor hubs; fasteners; and high strength-to-weight ratio critical forgings.
The alloy begins its journey with initial melting via vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Remelting is conducted through one or two vacuum arc steps to ensure purity and consistency.
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: 1,830°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 is versatile in its heat treatment capabilities.
1. Annealing: 1,275 - 1,400°F (691 - 760°C), ½ to 2 hours, followed by air or furnace cooling
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C), 1 to 8 hours, followed by air or furnace cooling
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C), 1 hour, water quench
4. Aging: 975 - 1,025°F (524 - 552°C), 4 to 8 hours, followed by air cooling
Optimum Properties
Small cross sections with rapid quenching exhibit superior properties in the solution treated and aged condition. Larger cross-sections or delayed quenching may present less than optimal properties.
Hardness
Typically, the hardness in the annealed condition is Rockwell C 30-34, while the solution-treated and aged condition achieves approximately Rockwell C 35-39.
Forgeability/Formability
Introducing the DAXUN Ti-6Al-4V Titanium Tube, Grade 5-an engineering marvel designed to withstand the most demanding environments. This titanium tube is meticulously forged at a precise temperature of 1,750°F (954°C) and undergoes a final forging process at 1,450°F (788°C). To achieve optimal results, a minimum reduction of 35% is highly recommended, ensuring unparalleled strength and durability.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges in forming at room temperature, even when annealed. However, severe forming operations like bending or stretching can be efficiently performed at elevated temperatures up to 1,200°F (649°C) without compromising mechanical properties. For hot sizing or forming, creep forming techniques can be applied effectively at temperatures between 1,000 to 1,200°F (538 to 649°C).
Machinability
Machining the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is a precise task, akin to machining austenitic stainless steels. It demands slow speeds, high feeds, robust tool rigidity, and ample application of non-chlorinated cutting fluids to achieve the best results.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube excels in weldability whether in the annealed state or the solution and partially aged conditions. Post-weld aging is achievable through heat treatment, provided stringent measures are taken to prevent contamination by oxygen, nitrogen, and hydrogen. Fusion welding can be executed within an inert gas-filled environment or with an inert gas tail shield protecting the molten metal and adjacent hot areas. Techniques such as spot welding, seam welding, and flash welding are also viable without the need for a protective atmosphere.
During post-weld heat treatment, aging is accomplished effectively. It is imperative to take precautions to avoid contamination with oxygen, nitrogen, and hydrogen. Fusion welding can be performed in an inert gas-filled chamber or using an inert gas tail shield to protect the molten metal and adjacent hot zones. Spot welding, seam welding, and flash welding are all feasible without a protective atmosphere.
Special Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube requires careful handling to avoid contamination. Improper pickling and the absorption of oxygen, nitrogen, and carbon during processes such as forging, heat treating, and brazing can introduce hydrogen contamination. Such contamination can compromise ductility, notch sensitivity, and formability, necessitating meticulous attention during handling and processing.
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