Daxun Alloy's Pure Titanium Grade 1 Tubes Feature:
Our seamless and welded titanium tubes boast unparalleled ductility and cold formability, making them perfect for deep drawing applications. The Grade 1 titanium tubes are acclaimed for their stellar general and seawater corrosion resistance, as well as their exceptional resilience against oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's distinguishing characteristics-low density (roughly half that of nickel-based alloys), high strength, lightweight nature, and formidable corrosion resistance-render it an ideal choice for a spectrum of severe chemical environments. Compliance with rigorous standards such as: ASTM B338, ASTM B265, ASME SB265, ASTM F67, ISO 5832-2, 3.7025, and UNS R50250 is guaranteed.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
Widely recognized for its industrial applications, the Grade 2 titanium tube delivers an exceptional balance of moderate strength and considerable ductility. It stands out for its superior corrosion resistance in both highly oxidizing and slightly reducing conditions, including chlorides. Its robust corrosion protection is indispensable in the chemical, offshore, and aerospace industries, and it's equally suitable for 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 with conventional techniques. It's easily machinable, albeit with a need to maintain sharp tools and abundant use of coolant. Similar to machining austenitic stainless steels, the process necessitates deep, continuous cuts with deliberate, controlled feeds and speeds.
Stock Availability
Daxun Alloys maintains a comprehensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes, available in a wide range of sizes.
Weight Reduction
CP 2 grade titanium tubes, renowned for their low density and high strength-to-weight ratio, are impeccable for applications necessitating weight reduction without compromising strength. They are adept at cold forming, exhibit commendable ductility, and are weldable using standard TIG and MIG processes, provided inert gas shielding is utilized to avert embrittlement of the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes exhibit an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. At approximately 885°C (1625°F), they transition to a beta (body-centered cubic) structure. This transformation temperature can be modified by the nature and concentration of impurities or alloying elements. The introduction of alloying elements bifurcates the single equilibrium transformation temperature into two zones: the alpha transformation zone, where the alloy remains in the alpha form, and the beta transformation zone, where the alloy transitions to the beta form. Between these zones, both alpha and beta forms coexist. Typical 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 meticulously crafted from hollow blanks using either a hot extrusion process or an oblique rolling and piercing process, followed by multiple cold rolling stages. Throughout the manufacturing process, the continuous perimeters of titanium seamless tubes are maintained. The comprehensive production of titanium seamless tubes encompasses: vacuum arc melting of sponge titanium ingots, blanking to create hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling + 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 crafted from annealed flat-rolled steel plate or steel strip using an advanced automatic arc welding (TIG) process. The intricate production processes include: 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 peak performance, welded pipes undergo at least one stress relief heat treatment post forming and welding. Note that Daxun refrains from using any filler materials during the welding process for uncompromised integrity.
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 titanium alloy, celebrated for its dual-phase (alpha+beta) composition. This alloy expertly combines aluminum as an alpha stabilizer with vanadium as a beta stabilizer, delivering remarkable strength even at temperatures as low as 800°F (427°C). The versatile ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging processes. It is extensively utilized in critical aerospace applications like jet engine compressor blades, disks, rings, fuselage, space capsule components, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and high strength-to-weight ratio forgings.
The alloy's journey begins with initial melting via vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). This is followed by one or two vacuum arc remelting steps to achieve superior 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 demanding exceptional hardness, tensile strength, and fatigue strength, the alloy is annealed at temperatures between 1,700-1,900°F (927 - 1,038°C).
DAXUN 6-4 Grade 5 Titanium Tube can be heat treated through various methods to achieve desired properties.
1. Annealing: Heat at 1,275 -1,400°F (691 - 760°C) for ½ to 2 hours, then cool in air or furnace.
2. Stress Relief Annealing: Heat at 1,000 -1,200°F (538 - 649°C) for 1 to 8 hours, then cool in air or furnace.
3. Solution Heat Treating: Heat at 1,675 -1,750°F (913 - 954°C) for 1 hour, then water quench.
4. Aging: Heat at 975 -1,025°F (524 - 552°C) for 4 to 8 hours, then air cool.
Optimum Properties
Achieving optimal properties depends on cross-section size and quenching speed. Smaller cross sections with rapid quenching yield superior results, whereas larger cross-sections or delayed quenching may result in suboptimal properties.
Hardness
In the annealed condition, the typical hardness is Rockwell C 30-34. In the solution treated and aged condition, it is approximately Rockwell C 35-39.
Forgeability/Formability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exemplifies exceptional craftsmanship, forged meticulously at a precise temperature of 1,750°F (954°C) and finalized at 1,450°F (788°C). To achieve optimal quality and performance, a reduction of at least 35% is highly recommended.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges in forming at room temperature, even when annealed. However, it allows for severe forming operations like bending or stretching at elevated temperatures up to 1,200°F (649°C) without compromising its robust mechanical properties. For hot sizing or forming, creep forming is a viable method at temperatures ranging between 1,000 and 1,200°F (538 to 649°C).
Machinability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be efficiently machined using techniques tailored for austenitic stainless steels. Employ slow speeds and high feeds, ensuring excellent tool rigidity and liberal application of non-chlorinated cutting fluids to achieve optimal results.
Weldability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exhibits excellent weldability when in either the annealed or solution and partially aged conditions. The subsequent aging process
is conducted during post-weld heat treatment. It is crucial 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 over the molten metal and adjacent hot zones. Additionally, spot welding, seam welding, and flash welding can be executed without a protective atmosphere.
Special Considerations
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube must be handled with care to prevent contamination by hydrogen through improper pickling, or absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can severely diminish ductility and adversely affect notch sensitivity and formability.
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