Daxun Alloy's premium titanium Grade 1 tubes include:
seamless and welded titanium tubes, renowned for their exceptional ductility and cold formability, making them perfect for deep drawing applications. Grade 1 titanium tubes offer outstanding general and seawater corrosion resistance, and exhibit excellent resilience against oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's low density (approximately half that of nickel-based alloys), high strength, lightweight characteristics, and superb corrosion resistance make it a top choice for challenging chemical environments. 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)
Grade 2 titanium tubes are highly sought after for industrial applications, striking a remarkable balance between moderate strength and excellent ductility. They provide superior corrosion resistance in both highly oxidizing and slightly reducing conditions, including chlorides, offering robust protection in the chemical and offshore industries, as well as aircraft manufacturing where forming ease and strength are essential. They are also pivotal in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping systems.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard methods. It can be readily machined, though meticulous attention is needed to maintain sharp tools and the liberal use of coolant. As with machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds to optimize results.
Stock Availability
Daxun Alloys maintains a comprehensive stock of CP 2 Grade Titanium Seamless and Welded Pipes in a diverse range of sizes to meet varying requirements.
Weight Reduction
CP 2 grade titanium tubes boast a low density and high strength-to-weight ratio, ideal for applications demanding weight reduction without compromising strength. They are cold formable, exhibit excellent ductility, and can be welded using conventional TIG and MIG processes, with inert gas shielding required to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes possess an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Upon reaching approximately 885°C (1625°F), they transform to a beta (body-centered cubic) structure. This transformation temperature can vary based on impurities or alloying additions. Alloying elements can also segment 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). Between these temperatures, both alpha and beta forms coexist. For Grade 2 titanium, typical alpha and beta transformation temperatures 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. Throughout manufacturing, titanium seamless tubes must maintain continuous perimeters. The meticulous manufacturing process starts with sponge titanium vacuum arc melting to create ingot blanks, followed by cleaning, cutting, and feeding for hot extrusion or oblique rolling and piercing. The process continues with degreasing, drying, cutting, online annealing and straightening, pickling, multiple cold rolling, further degreasing, drying, vacuum annealing, straightening, cutting, final pickling, inspection, marking (DAXUN), and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium welded pipe exemplifies precision and excellence. Crafted from annealed flat-rolled steel plates or strips through the advanced automatic arc welding (TIG) process, this product undergoes a rigorous manufacturing journey. The main production stages 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 benefits from at least one stress relief heat treatment post-formation and welding. Notably, Daxun ensures no filler materials are used during the meticulous welding process, promising unparalleled quality and 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 pinnacle of titanium alloys. This sophisticated duplex alpha+beta titanium alloy is enhanced with aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This high-strength material thrives at low temperatures, approximately 800°F (427°C). The acclaimed ATI Ti-6Al-4V, Grade 5 alloy, serves crucial applications including annealing, solution treating, and aging. It is indispensable in manufacturing compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings requiring an exemplary strength-to-weight ratio.
The initial melting of this alloy employs cutting-edge methods including vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). The remelting process is meticulously conducted in one or two vacuum arc steps, ensuring the highest quality and consistency.
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: 1,830°F (± 25°); 999°C (± 14°)
Heat Treatment
For applications demanding high hardness, tensile strength, and fatigue strength, annealing is performed at temperatures between 1,700-1,900°F (927 - 1,038°C).
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options, tailored to suit various 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
The solution-treated and aged condition achieves optimal properties in small cross-sections with rapid quenching, whereas larger cross-sections or delayed quenching may yield less than peak properties.
Hardness
In the annealed state, the typical hardness ranges from Rockwell C 30-34, escalating to approximately Rockwell C 35-39 in the solution and aged condition.
Forgeability/Formability
Introducing the DAXUN Ti-6Al-4V Titanium Tube, also known as Grade 5 Titanium Tube. This outstanding tube is expertly forged at an initial temperature of 1,750°F (954°C) and completed at a final forging temperature of 1,450°F (788°C). For optimal performance and quality, a reduction of at least 35% is recommended.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, presents unique forming challenges at room temperature, even in its annealed state. Therefore, intense forming operations such as bending or stretching are best executed on annealed material at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical excellence. Additionally, creep forming is a viable method for hot sizing or forming, effective at temperatures between 1,000 and 1,200°F (538 to 649°C).
Machinability
When it comes to machining, the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, offers adaptability similar to that of austenitic stainless steels. Optimal machining requires slow speeds, high feeds, robust tool rigidity, and substantial use of non-chlorinated cutting fluids.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, showcases excellent weldability whether in its annealed, solution, or partially aged conditions. The aging process is efficiently achieved during post-weld heat treatment.
Special precautions are necessary to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding is best conducted in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding can be executed effectively without a protective atmosphere.
Special Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, warrants particular attention to avoid contamination by hydrogen during improper pickling and by oxygen, nitrogen, and carbon absorption during processes like forging, heat treating, and brazing. Such contamination can detrimentally impact ductility, notch sensitivity, and overall formability.
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