Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless titanium tubes and welded titanium tubes designed for impeccable ductility and cold formability, perfect for deep drawing applications. Renowned for their outstanding general and seawater corrosion resistance, Grade 1 titanium tubes excel in resisting oxidizing, neutral, and slightly reducing media, including chlorides.
Titanium's low density-approximately half that of nickel-based alloys-combined with its high strength, lightweight, and superb corrosion resistance, make it a prime selection for challenging chemical environments. 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)
Widely used in industrial applications, Grade 2 titanium tubes offer a remarkable balance of moderate strength and notable ductility. These tubes provide exceptional corrosion resistance in both highly oxidizing and slightly reducing conditions, including chlorides. They are extensively employed in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite and 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 is also easily machinable, provided that sharp tools and liberal coolant are used. Similar to machining austenitic stainless steels, the cutting process should involve deep and continuous cuts with slow feeds and speeds to maintain precision.
Stock Availability
Daxun Alloys maintains an extensive stock of CP 2 Grade Titanium Seamless and Welded Pipes, available in various sizes to meet diverse requirements.
Weight Reduction
CP 2 Grade Titanium Tubes boast a low density and a high strength-to-weight ratio, making them ideal for applications demanding weight reduction without compromising strength. These tubes are cold formable, exhibit excellent ductility, and can be welded using conventional TIG and MIG processes, with inert gas shielding to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes display an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Upon reaching approximately 885°C (1625°F), this structure transitions to a beta (body-centered cubic) form. The transformation temperature can vary with the presence of impurities or alloying elements, which also split the equilibrium transformation temperature into two zones: the alpha transformation zone (below which the alloy remains all alpha) and the beta transformation zone (above which the alloy is all beta). Between these two zones, both alpha and beta forms coexist. Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) for alpha and 913°C (1675°F) for beta.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks through hot extrusion or oblique rolling and piercing, followed by several cold rolling processes. Throughout manufacturing, these seamless tubes maintain continuous perimeters. The comprehensive manufacturing process involves: sponge titanium vacuum arc melting, ingot blanking to acquire hollow blanks, cleaning, cutting and 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 crafted from premium annealed flat-rolled steel plate or steel strip using the precision of the automatic arc welding (TIG) process. The main 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. Each welded pipe undergoes at least one stress relief heat treatment post-forming and welding. Notably, Daxun employs filler materials during the welding process to ensure superior quality.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) is the most sought-after titanium alloy. This duplex alpha+beta titanium alloy utilizes aluminum as the alpha stabilizer and vanadium as the beta stabilizer, offering remarkable strength even at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is utilized for annealing, solution treating, and aging. It is ideal for compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings, all requiring a high strength-to-weight ratio.
The alloy is initially melted using advanced techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting may involve one or two vacuum arc steps to ensure superior material 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
Annealed at 1,700-1,900°F (927 - 1,038°C), this treatment yields high hardness, tensile strength, and exceptional fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options.
1. Annealing: 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, followed by air or furnace cooling.
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C) for 1 hour, with a water quench.
4. Aging: 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, followed by air cooling.
Optimum Properties
Optimal properties are achieved with small cross sections and rapid quenching in the solution treated and aged condition. Larger cross-sections or delayed quenching may result in less than optimal properties.
Hardness
Typical hardness in the annealed condition ranges from Rockwell C 30-34, and approximately Rockwell C 35-39 in the solution treated and aged condition.
Forgeability/Formability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, exemplifies superior forgeability, forged at an impressive temperature of 1,750°F (954°C) and reaching a final forging state at 1,450°F (788°C). For optimal results, a reduction of at least 35% is recommended, ensuring unparalleled performance and durability.
Although DAXUN Ti-6Al-4V Titanium Tube, Grade 5, presents challenges when forming at room temperature-even post-annealing-it excels in severe forming operations such as bending and stretching at elevated temperatures up to 1,200°F (649°C). Without altering its mechanical properties, this tube can undergo creep forming for hot sizing or shaping at an impressive range of 1,000 to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, is engineered for exceptional machinability, akin to austenitic stainless steels. Employing slow speeds, high feed rates, robust tool rigidity, and copious amounts of non-chlorinated cutting fluids, this tube ensures precise and efficient machining outcomes.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, offers remarkable weldability whether in the annealed state or during solution and partial aging processes. Post-weld heat treatment can effectively complete the aging process.
To preserve the integrity of the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, while welding, measures must be taken to prevent contamination by oxygen, nitrogen, and hydrogen. Fusion welding should occur within an inert gas-filled chamber or using an inert gas tail shield over the molten metal and adjacent hot zones. Methods like spot welding, seam welding, and flash welding can be achieved without a protective atmosphere.
Special Considerations
It's crucial to handle the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, with care to avoid hydrogen contamination from improper pickling and the absorption of oxygen, nitrogen, and carbon during various processes, including forging and heat treating. Such contamination can diminish ductility, and impair notch sensitivity and formability, thereby affecting overall performance.
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