Daxun Alloy's Pure Titanium Grade 1 Titanium Tubes Include:
Seamless titanium tubes and welded titanium tubes from Jiangsu Daxun Alloy Co., Ltd. boast outstanding ductility and cold formability, making them perfect for deep drawing applications. These Grade 1 titanium tubes are celebrated for their strong general and seawater corrosion resistance, along with exceptional resistance to oxidizing, neutral, and mildly reducing media, including chlorides.
Titanium's low density-approximately half that of nickel-based alloys-combined with high strength, light weight, and superior corrosion resistance, makes it an ideal material for various demanding chemical conditions. Execution standards include: ASTM B338, ASTM B265, ASME SB265, ASTM F67, ISO 5832-2, 3.7025, and UNS R50250.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
This widely-used titanium tube in industrial applications strikes a perfect balance between moderate strength and reasonable ductility. It offers outstanding corrosion resistance in both highly oxidizing and slightly reducing environments, including chlorides. This versatility makes it invaluable in the chemical and offshore industries, aircraft manufacturing, 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 methods. While it can be readily machined, it requires special attention, such as maintaining sharp tools and liberal coolant usage. Similar to machining austenitic stainless steels, cuts should be deep and continuous 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 to meet diverse needs.
Weight Reduction
CP 2 Grade Titanium Tubes stand out with their low density and high strength-to-weight ratio, ideal for applications demanding weight reduction without compromising strength. They are cold formable, exhibit good ductility, and are weldable using conventional TIG and MIG processes, provided inert gas shielding is used to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 Titanium Tube exhibits an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. Around 885°C (1625°F), it transforms into a beta (body-centered cubic) structure. This transformation temperature can vary based on impurities or alloying elements. Alloying additions also split the single temperature of equilibrium transformation into two zones: the alpha transformation zone (below which the alloy is all alpha) and the beta transformation zone (above which the alloy is all beta). 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 expertly crafted from hollow blanks through hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling stages. These seamless tubes maintain continuous perimeters throughout manufacturing. The process includes: sponge titanium vacuum arc melting, ingot blanking to create hollow blanks, cleaning, cutting, 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, meticulously crafted from annealed flat-rolled steel plate or steel strip, utilizes the advanced automatic arc welding (TIG) process. The comprehensive production stages include: titanium plate uncoiling, shearing, butt welding, cleaning, pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing, sizing, straightening, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. To ensure unparalleled quality, each welded pipe undergoes at least one stress relief heat treatment post-forming and welding. Notably, Daxun employs any filler materials during the welding process to guarantee superior performance.
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 pinnacle of titanium alloys. This duplex alpha+beta titanium alloy features aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its high strength, this alloy remains resilient at low temperatures around 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging, making it perfect for key aerospace and industrial applications, including compressor blades, disks, and rings for jet engines, fuselage and space capsule components, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and critical high-strength-to-weight ratio forgings.
The alloy's initial melting is performed using state-of-the-art vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM) techniques. This is followed by one or two steps of vacuum arc remelting to ensure exceptional purity and quality.
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 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
Annealed at 1,700-1,900°F (927 - 1,038°C) when high hardness, tensile strength, and fatigue strength are paramount.
DAXUN 6-4 Grade 5 Titanium Tube is versatile in its heat treatment options.
1. Annealing: Achieve superior results at 1,275 -1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Optimal at 1,000 -1,200°F (538 - 649°C) for 1 to 8 hours, with subsequent air or furnace cooling.
3. Solution Heat Treating: Excellence at 1,675 -1,750°F (913 - 954°C) for 1 hour, with a water quench finish.
4. Aging: Perfect at 975 -1,025°F (524 - 552°C) for 4 to 8 hours, followed by air cooling.
Optimum Properties
Achieve optimal properties with small cross sections and rapid quenching in the solution-treated and aged condition. Larger cross-section sizes or delayed quenching may yield less than ideal 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
The DAXUN Ti-6Al-4V Titanium Tube, recognized as Grade 5 Titanium Tube, exhibits optimal forgeability when processed at an initial temperature of 1,750°F (954°C) and a final forging temperature of 1,450°F (788°C). For superior results and enhanced mechanical properties, it is recommended to achieve a reduction of at least 35%.
The DAXUN Ti-6Al-4V Titanium Tube, classified as Grade 5 Titanium Tube, presents challenges in formability at ambient temperatures, even after annealing. To execute demanding forming operations such as bending or stretching, the material should be processed in its annealed state at elevated temperatures up to 1,200°F (649°C) without altering its mechanical integrity. For hot sizing or forming, creep forming techniques are applicable within a temperature range of 1,000 to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, known as Grade 5 Titanium Tube, is amenable to machining using techniques typical for austenitic stainless steels. To ensure optimal results, it is critical to apply slow speeds, high feeds, robust tool rigidity, and copious amounts of non-chlorinated cutting fluids.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, identified as Grade 5 Titanium Tube, demonstrates excellent weldability in both its annealed and solution-treated, partially aged conditions. Post-weld heat treatment can foster aging to enhance properties.
During post-weld heat treatment, aging is accomplished while stringent precautions are essential to prevent contamination from oxygen, nitrogen, and hydrogen. 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. Additional welding methods such as spot welding, seam welding, and flash welding can be effectively performed without needing a protective atmosphere.
Special Considerations
The DAXUN Ti-6Al-4V Titanium Tube, referred to as Grade 5 Titanium Tube, requires careful handling to avoid contamination with hydrogen from improper pickling and the absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can detrimentally affect ductility, notch sensitivity, and formability.
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