Daxun Alloy's premium pure titanium Grade 1 tubes encompass:
seamless and welded titanium tubes, celebrated for their outstanding ductility and cold formability, making them perfect for deep drawing. Grade 1 titanium tubes are noted for superior general and seawater corrosion resistance, coupled with excellent resistance to oxidizing, neutral, and slightly reducing environments (solutions) (including chlorides).
With a low density (approximately half that of nickel-based alloys), high strength, lightweight, and exceptional corrosion resistance, titanium is the preferred choice for various demanding 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)
This titanium tube is the industry standard for numerous industrial applications, striking an optimal balance of moderate strength and reasonable ductility. It boasts excellent corrosion resistance in both highly oxidizing and slightly reducing conditions (including chlorides). Ideal for chemical and offshore industries, as well as aircraft manufacturing, where strength and formability are critical. Additional uses include heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. It can be easily machined with a focus on maintaining sharp tools and liberal coolant use. Similar to machining austenitic stainless steels, the process should involve 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 diverse sizes.
Weight Reduction
CP 2 grade titanium tubes, with their low density and high strength-to-weight ratio, are perfect for applications demanding weight reduction without compromising strength. They offer cold formability, good ductility, and weldability using conventional TIG and MIG processes, albeit with 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 around 885°C [1625°F], it transitions to a beta (body-centered cubic) structure. The transformation temperature adjusts with different impurities or alloying additions. Alloying elements can split the single equilibrium transformation temperature into two zones: the alpha zone below which the alloy is all alpha, and the beta zone above which the alloy is all beta. Between these temperatures, both alpha and beta forms coexist. Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) and 913°C (1675°F).
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks using a hot extrusion process or oblique rolling and piercing, followed by multiple cold rolling processes. The manufacturing process ensures continuous perimeters at all stages. Key steps include: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting, feeding, hot extrusion or oblique rolling and 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 using the sophisticated automatic arc welding (TIG) process. The primary steps involved in production encompass: 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 optimal performance, welded pipes undergo at least one stress relief heat treatment post-forming and welding. Notably, Daxun's manufacturing process does not incorporate any filler materials during welding.
Ti-6Al-4V Titanium Pipe - Premium Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), stands as the epitome of titanium alloys, celebrated for its duplex alpha+beta composition. It utilizes aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This robust alloy can endure low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is distinguished in applications including annealing, solution treating, and aging. It is crucial for manufacturing components like compressor blades, disks, rings for jet engines, fuselage and space capsule parts, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and other critical forgings requiring a superior strength-to-weight ratio.
Initially, the alloy undergoes melting through vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting is conducted via one or two vacuum arc processes.
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
When exceptional hardness, tensile strength, and fatigue strength are desired, annealing at 1,700-1,900°F (927 - 1,038°C) is recommended.
DAXUN 6-4 Grade 5 Titanium Tube is versatile and can be heat treated via several methods.
1. Annealing: 1,275 - 1,400°F; (691 - 760°C), ½ to 2 hours, air or furnace cool
2. Stress Relief Annealing: 1,000 - 1,200°F; (538 - 649°C), 1 to 8 hours, air or furnace cool
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 - air cool
Optimum Properties
Achieving optimal properties is feasible with small cross-sections and rapid quenching in the solution treated and aged state. Larger cross-sections or delayed quenching may lead to suboptimal results.
Hardness
The typical hardness for annealed conditions is Rockwell C 30-34, while the solution treated and aged conditions yield a hardness of approximately Rockwell C 35-39.
Forgeability/Formability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, showcases exceptional forgeability at elevated temperatures. Forging at 1,750°F (954°C) and finalizing at 1,450°F (788°C) is recommended, with a reduction rate of at least 35% for optimal results.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, presents challenges in forming at room temperature, even post-annealing. However, it excels in severe forming operations such as bending or stretching at temperatures up to 1,200°F (649°C) without altering its mechanical integrity. For precise hot sizing or forming, creep forming is effective between 1,000 to 1,200°F (538 to 649°C).
Machinability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, can be efficiently machined using techniques suitable for austenitic stainless steels. Employ slow speeds, high feeds, robust tool rigidity, and copious amounts of non-chlorinated cutting fluids for best results.
Weldability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, offers excellent weldability in both annealed and solution/partially aged conditions, with post-weld heat treatment aiding aging.
To ensure optimal weld quality, precautions against contamination by oxygen, nitrogen, and hydrogen are essential. Fusion welding should be conducted in an inert gas-filled chamber or with an inert gas tail shield to protect the molten metal and adjacent hot zones. Techniques like 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, is susceptible to hydrogen contamination from improper pickling and absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can reduce ductility, and negatively impact notch sensitivity and formability.
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