Daxun Alloy's exquisite Grade 1 pure titanium tubes encompass:
Seamless titanium tubes and expertly welded titanium tubes, renowned for their exceptional ductility and cold formability, making them the perfect choice for deep drawing. Grade 1 titanium tubes are celebrated for their outstanding general and seawater corrosion resistance, as well as their excellent resistance to oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium, with its low density (approximately half that of nickel-based alloys), high strength, lightweight properties, and corrosion resistance, stands out as an excellent choice for various harsh chemical conditions. 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)
The Grade 2 Titanium Tube is the most frequently utilized titanium tube for industrial applications, offering an exceptional balance of moderate strength and impressive ductility. It delivers superior corrosion resistance in both highly oxidizing and slightly reducing environments (including chlorides). This tube ensures robust corrosion protection for the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and various piping applications.
Fabrication
Titanium Grade 2 exhibits excellent responsiveness to cold forming using standard methods. It can be efficiently machined, provided that sharp tools are maintained and liberal use of coolant is ensured. Similar to machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a robust stock of CP 2 Grade Titanium Seamless and Welded Pipes in a diverse range of sizes.
Weight Reduction
CP 2 grade titanium tubes, with their low density and high strength-to-weight ratio, are ideal for applications where weight reduction is essential without compromising overall strength. These tubes are cold-formable, exhibit excellent ductility, and can be welded using conventional TIG and MIG processes, necessitating inert gas shielding to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube features 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. The inclusion of alloying elements also divides the single temperature of the equilibrium transformation into two temperature zones: the alpha transformation zone, below which the alloy is all alpha, and the beta transformation zone, above which the alloy is all beta. Between these temperatures, 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 using hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling steps. Throughout manufacturing, titanium seamless tubes should maintain continuous perimeters. The meticulous production process involves: vacuum arc melting of sponge titanium, 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 advanced automatic arc welding (TIG) process. The comprehensive production itinerary includes: titanium plate uncoiling, shearing, butt welding, cleaning, pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing, sizing, straightening, eddy current testing, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. Every welded pipe undergoes at least one stress relief heat treatment post-formation and welding, ensuring the utmost quality. Notably, Daxun employs any filler materials during the welding phase to maintain superior standards.
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 most sought-after titanium alloy, celebrated for its duplex alpha+beta composition. This innovative alloy leverages aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Distinguished by its remarkable strength, this alloy performs exceptionally at low temperatures around 800°F (427°C). ATI Ti-6Al-4V, Grade 5 is ideally suited for annealing, solution treating, and aging processes. It finds applications in a myriad of critical components, including compressor blades, disks, and rings for jet engines; fuselage and space capsule parts; pressure vessels; *** casings; helicopter rotor hubs; fasteners; and high-strength-to-weight ratio forgings.
The alloy's initial melting involves sophisticated techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting occurs through one or two steps of vacuum arc processing.
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
The alloy is annealed at temperatures between 1,700-1,900°F (927 - 1,038°C), optimizing its hardness, tensile strength, and fatigue resistance.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options, tailored to specific requirements.
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, then air or furnace cooling.
3. Solution Heat Treating: 1,675 -1,750°F (913 - 954°C), 1 hour, followed by a water quench.
4. Aging: 975 -1,025°F (524 - 552°C), 4 to 8 hours, followed by air cooling.
Optimum Properties
In the solution-treated and aged conditions, small cross-sections with rapid quenching exhibit optimal properties. Larger cross-sections or delayed quenching may yield less than optimal results.
Hardness
The alloy typically showcases a Rockwell hardness of C 30-34 in the annealed state and approximately C 35-39 in the solution-treated and aged state.
Forgeability/Formability
The DAXUN Ti-6Al-4V Titanium Tube, also known as Grade 5 Titanium Tube, stands out in strength and durability. Forged at an initial temperature of 1,750°F (954°C) and finished at 1,450°F (788°C), this tube ensures peak performance. A reduction rate of at least 35% is recommended to achieve optimal results, exemplifying our commitment to quality and excellence.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, resists forming at room temperature even after annealing, making severe operations like bending or stretching feasible at temperatures up to 1,200°F (649°C) without altering mechanical properties. For precision hot sizing or forming, creep forming is effective at 1,000 to 1,200°F (538 to 649°C), ensuring the material's integrity and versatility in demanding applications.
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, can be machined with the techniques used for austenitic stainless steels. By employing slow speeds and high feeds, coupled with robust tool rigidity and abundant non-chlorinated cutting fluids, precision and efficiency in machining are assured.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, is highly weldable whether annealed or in solution and partially aged conditions. Post-weld heat treatment can achieve aging while ensuring the material remains free from contamination by oxygen, nitrogen, and hydrogen. Employing an inert gas-filled chamber or an inert gas tail shield enhances weld integrity. Additionally, spot, seam, and flash welding can be conducted without needing a protective atmosphere.
During post-weld heat treatment, aging is completed with meticulous care to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding benefits from an inert gas-filled chamber or an inert gas tail shield over the molten metal and adjacent hot zones, while techniques like spot welding, seam welding, and flash welding do not necessitate a protective atmosphere.
Special Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, must be handled with care to avoid hydrogen contamination from improper pickling and the absorption of oxygen, nitrogen, and carbon during forging, heat treating, or brazing. Such contaminants can reduce ductility and affect notch sensitivity and formability, making our stringent quality controls essential to maintain peak performance.
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