Daxun Alloy's pure titanium Grade 1 tubes include:
Seamless and welded titanium tubes which possess outstanding ductility and cold formability, making them perfect for deep drawing applications. Grade 1 titanium tubes are renowned for their excellent general and seawater corrosion resistance, as well as exceptional resistance to oxidizing, neutral, and slightly reducing environments (including chlorides).
Titanium's low density (approximately half that of nickel-based alloys), combined with high strength, lightweight, and superior corrosion resistance, makes it an exceptional choice for various demanding chemical environments. The standards it adheres to 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 frequently employed in industrial applications due to its superb balance of moderate strength and reasonable ductility. It offers excellent corrosion resistance in highly oxidizing and slightly reducing conditions (including chlorides). Widely used in the chemical and offshore industries, as well as aircraft manufacturing, it provides the necessary strength and ease of forming. Additional applications include heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping.
Fabrication
Titanium Grade 2 performs well in cold forming with standard methods. It can be easily machined, provided sharp tools are maintained and ample coolant is used. Similar to machining austenitic stainless steels, it requires deep, continuous cuts with slow feed rates and speeds.
Stock Availability
Daxun Alloys stocks CP 2 Grade Titanium Seamless and Welded Pipes in various sizes.
Weight Reduction
CP 2 grade titanium tubes offer low density and a high strength-to-weight ratio, making them ideal for applications where weight reduction is crucial without compromising overall strength. They are cold formable with good ductility and can be welded using conventional TIG and MIG processes, requiring inert gas shielding 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. At approximately 885°C [1625°F], it transitions to a beta (body-centered cubic) structure. This transformation temperature can vary based on the type and quantity of impurities or alloying additions. Introducing alloying elements also divides the 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. 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 produced from hollow blanks using either a hot extrusion process or oblique rolling and piercing process, followed by several cold rolling procedures. The seamless tubes must maintain continuous perimeters throughout the manufacturing stages. The complete manufacturing process includes: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling with 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 expertly crafted from annealed flat-rolled steel plate or steel strip via the state-of-the-art automatic arc welding (TIG) process. The meticulous 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. Each welded pipe undergoes a mandatory stress relief heat treatment post-forming and welding, ensuring optimal performance and durability. Notably, Daxun employs filler materials during the welding process, enhancing the pipe's integrity and reliability.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), stands as the pinnacle of titanium alloys. This duplex alpha+beta titanium alloy, fortified with aluminum as the alpha stabilizer and vanadium as the beta stabilizer, boasts unparalleled strength and versatility. Capable of withstanding low temperatures around 800°F (427°C), the ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging. Its applications span across critical components such as compressor blades, disks, and rings for jet engines; fuselage and space capsule parts; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and high strength-to-weight ratio forgings.
The alloy's initial melting is achieved through advanced techniques like vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). The remelting process involves one or two vacuum arc steps, ensuring superior 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 PropertiesTi-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 required, the titanium tube is annealed at 1,700-1,900°F (927 - 1,038°C).
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options, tailored to meet varied industrial 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 Achieving the finest properties involves rapid quenching in the solution treated and aged condition for smaller cross sections. For larger cross-sections or with delayed quenching, optimal properties may be compromised.
HardnessIn its annealed state, the typical hardness ranges from Rockwell C 30-34, and approximately Rockwell C 35-39 in the solution treated and aged condition, ensuring robust performance across applications.
Forgeability/Formability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is expertly forged at a precise temperature of 1,750°F (954°C), with the final forging temperature meticulously controlled at 1,450°F (788°C). For optimal results, a substantial reduction of at least 35% is highly recommended.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube proves challenging to form at room temperature, even post-annealing. Thus, intensive forming operations like bending or stretching should be conducted on annealed material at elevated temperatures up to 1,200°F (649°C) to maintain its excellent mechanical properties. For precision hot sizing or forming, creep forming is ideal at temperatures between 1,000 to 1,200°F (538 to 649°C).
Machinability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be precisely machined using techniques suitable for austenitic stainless steels. Ensure the use of slow speeds, high feeds, robust tool rigidity, and copious amounts of non-chlorinated cutting fluids for exceptional results.
Weldability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube demonstrates excellent weldability in both annealed and solution-treated, partially aged conditions. The post-weld heat treatment process includes essential aging.
To prevent contamination from oxygen, nitrogen, and hydrogen during welding, DAXUN Ti-6Al-4V Titanium Tube should be welded in an inert gas-filled environment or using an inert gas tail shield over molten metal and adjacent heated areas. Techniques such as spot welding, seam welding, and flash welding are effective even without a protective atmosphere.
Special Considerations DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube requires careful handling to avoid hydrogen contamination from improper pickling, as well as the absorption of oxygen, nitrogen, and carbon during processes like forging and heat treating. Such contamination can significantly reduce ductility and impair notch sensitivity and formability.