Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless and welded titanium tubes, renowned for their exceptional ductility and cold formability, making them ideal for deep drawing. Grade 1 titanium excels in general and seawater corrosion resistance, offering unparalleled protection against oxidizing, neutral, and slightly reducing media (solutions) including chlorides.
Titanium's low density-about half that of nickel-based alloys-coupled with high strength, lightweight, and impressive corrosion resistance, make it the material of choice for challenging 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)
The most widely used titanium tube in industrial applications, Grade 2 offers a perfect balance of moderate strength and reasonable ductility. It boasts excellent corrosion resistance under both highly oxidizing and slightly reducing conditions (including chlorides) and is indispensable in chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 is highly amenable to cold forming with standard methods. While machining, it's crucial to use sharp tools and ample coolant. Similar to machining austenitic stainless steels, deep and continuous cuts with slow feeds and speeds are recommended.
Stock Availability
Daxun Alloys maintains a robust inventory of CP 2 Grade Titanium Seamless and Welded Pipes in diverse sizes.
Weight Reduction
CP 2 Grade Titanium Tubes, with their low density and superior strength-to-weight ratio, are perfect for applications demanding weight reduction without compromising strength. These tubes are cold formable, exhibit good ductility, and can be welded 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 possesses an alpha (hexagonal close-packed) crystal structure, akin 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 can vary based on impurities or alloying additions. Alloying elements can also split the single equilibrium transformation temperature 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 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 expertly crafted from hollow blanks via hot extrusion or oblique rolling and piercing, followed by multiple cold rolling processes. These seamless tubes maintain continuous perimeters throughout production. The comprehensive manufacturing process includes: sponge titanium vacuum arc melting, ingot blanking for hollow blanks, cleaning, cutting, 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 meticulously crafted from annealed flat-rolled steel plate or steel strip through the advanced automatic arc welding (TIG) process. The comprehensive production stages 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 the highest quality, welded pipes undergo at least one stress relief heat treatment post-forming and welding. Notably, Daxun refrains from using any filler materials during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) stands as the preeminent titanium alloy, celebrated for its duplex alpha+beta titanium composition. It leverages aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its extraordinary strength, DAXUN Ti-6Al-4V is ideal for applications requiring resilience at low temperatures, approximately 800°F (427°C). This versatile alloy is crucial for annealing, solution treating, and aging processes. Its applications are vast, including compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings demanding a superior strength-to-weight ratio.
The alloy's initial melting process employs advanced techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting is executed through one or two vacuum arc steps to ensure 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 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 high hardness, tensile strength, and fatigue strength are paramount, the alloy is annealed at 1,700-1,900°F (927 - 1,038°C).
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to cater to diverse application needs.
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
To achieve optimal properties, small cross sections should undergo rapid quenching in the solution treated and aged condition. Conversely, larger cross-section sizes and delayed quenching might yield less than ideal properties.
Hardness
In the annealed condition, the typical hardness ranges from Rockwell C 30 to 34. In the solution treated and aged condition, it approximates Rockwell C 35 to 39.
Forgeability/Formability
The superior DAXUN Ti-6Al-4V Titanium Tube, Grade 5, undergoes precision forging at an initial temperature of 1,750°F (954°C), tapering down to a final forging temperature of 1,450°F (788°C). To achieve optimal outcomes, a reduction of at least 35% is strongly advised.
Engineered for excellence, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, presents challenges in forming at room temperature, even post-annealing. Rigorous forming operations, including bending or stretching, are feasible on annealed material at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical integrity. For hot sizing or forming, creep forming can be effectively employed within the temperature range of 1,000 to 1,200°F (538 to 649°C).
Enhanced Machinability
Exemplifying advanced machinability, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, can be adeptly machined using techniques tailored for austenitic stainless steels. This involves slow speeds, high feed rates, robust tool rigidity, coupled with the profuse use of non-chlorinated cutting fluids.
Remarkable Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, showcases exceptional weldability in both the annealed and solution treated, partially aged conditions. Post-weld aging further enhances its properties.
During welding, it is crucial to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding should be conducted in a chamber filled with inert gas or with an inert gas tail shield to protect the molten metal and adjacent hot zones. Additionally, spot welding, seam welding, and flash welding can be performed without the necessity of a protective atmosphere.
Vital Special Considerations
The premium DAXUN Ti-6Al-4V Titanium Tube, Grade 5, must be handled with care to avoid contamination from hydrogen during improper pickling, and from oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination may detrimentally affect ductility, notch sensitivity, and formability.
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