Daxun Alloy's pure titanium Grade 1 titanium tubes include:
Seamless titanium tubes and welded titanium tubes, boasting exceptional ductility and cold formability, making them perfect for deep drawing applications. Grade 1 titanium tubes excel in general and seawater corrosion resistance, offering superb protection against oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's low density (approximately half that of nickel-based alloys), coupled with its high strength, light weight, and remarkable corrosion resistance, makes it an unparalleled choice for various harsh chemical environments. Our 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 recognized as the most commonly used titanium tube for industrial applications, the Grade 2 Titanium Tube strikes an ideal balance between moderate strength and reasonable ductility. It delivers outstanding corrosion resistance in both highly oxidizing and slightly reducing conditions, including chlorides. This versatile tube is extensively utilized across various industries including chemical, offshore, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping solutions.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard methods. It is easily machinable; however, maintaining sharp tools and using liberal amounts of coolant are crucial. Similar to machining austenitic stainless steels, the process requires deep and continuous cuts with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a robust stock of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes, ensuring quick and reliable availability for diverse applications.
Weight Reduction
CP 2 grade titanium tubes, characterized by their low density and high strength-to-weight ratio, are ideal for applications demanding weight reduction without compromising overall strength. These tubes are cold formable, exhibit excellent ductility, and can be welded using conventional TIG and MIG processes, provided that inert gas shielding is employed to prevent weld zone embrittlement.
Crystal Structure
At ambient temperature, ASTM B338 Grade 2 titanium tube possesses an alpha (hexagonal close-packed) crystal structure, identical to commercially pure titanium grades 1 and 3. Upon reaching approximately 885°C [1625°F], it transitions to a beta (body-centered cubic) structure. This transformation temperature is subject to variation based on the type and quantity of impurities or alloying elements, which also bifurcate the equilibrium transformation temperature into two distinct zones: the alpha transformation zone, below which the alloy is purely alpha, and the beta transformation zone, above which the alloy is purely beta. Between these temperatures, both alpha and beta phases coexist. Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) for alpha to beta and 913°C (1675°F) for beta to alpha.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks through hot extrusion or oblique rolling and piercing processes, followed by a series of cold rolling steps. These seamless tubes must maintain continuous perimeters during all stages of manufacturing. The comprehensive production process involves: 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 utilizing the state-of-the-art automatic arc welding (TIG) process. The comprehensive production process includes: 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. To ensure the highest quality, each welded pipe undergoes at least one stress relief heat treatment post-formation and welding. Notably, Daxun refrains from using any filler materials during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) stands as the pinnacle of titanium alloy popularity. This duplex alpha-beta titanium alloy employs aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its high strength, it remains effective at low temperatures up to approximately 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is utilized extensively for annealing, solution treating, and aging. Its 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 other critical forgings where a high strength-to-weight ratio is paramount.
The alloy is initially melted using advanced methods such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting is achieved through one or two vacuum arc steps, ensuring optimal purity and consistency.
Specifications
• ASTE 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 PropertiesTi-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 resistance.
DAXUN 6-4 Grade 5 Titanium Tube can undergo various heat treatment techniques to tailor its properties.
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, air or furnace cool.
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by a water quench.
4. Aging: 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, then air cool.
Optimum Properties For optimal properties, small cross sections should be rapidly quenched after solution treatment and aging. Larger cross sections and/or delayed quenching might result in less than ideal properties.
HardnessTypical hardness in the annealed condition ranges from Rockwell C 30-34, and in the solution and aged condition, it ranges from Rockwell C 35-39.
Forgeability/Formability The DAXUN Ti-6Al-4V Titanium Tube, also known as Grade 5 Titanium Tube, exhibits premium forgeability. It is best forged at a high temperature of 1,750°F (954°C) and typically finishes at 1,450°F (788°C). For optimal results, a reduction of at least 35% during forging is recommended.
Though challenging to form at room temperature, even when annealed, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, can undergo severe forming operations like bending or stretching at elevated temperatures up to 1,200°F (649°C) without altering its mechanical properties. Additionally, creep forming is suitable for hot sizing or forming at temperatures between 1,000 and 1,200°F (538 to 649°C).
Machinability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, can be effectively machined using techniques designed for austenitic stainless steels. This process involves slow speeds, high feeds, robust tool rigidity, and an ample supply of non-chlorinated cutting fluids to ensure precision and efficiency.
Weldability Eminently weldable, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, performs well whether annealed or in solution and partially aged conditions. Post-weld aging heat treatment enhances its properties.
To prevent contamination from oxygen, nitrogen, and hydrogen, welding must be performed using precautions such as fusion welding in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones. Spot welding, seam welding, and flash welding are all feasible without a protective atmosphere.
Special Considerations Special attention is necessary to avoid contamination of the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, with hydrogen during improper pickling and the absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing. Such contamination can lead to a reduction in ductility, increased notch sensitivity, and impaired formability.
