Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
This is the most frequently used titanium tube for industrial applications, offering an exceptional balance of moderate strength and excellent ductility. Renowned for its outstanding corrosion resistance, it performs remarkably well in both highly oxidizing and mildly reducing environments (such as chlorides). This makes it an ideal choice for industries like chemical processing, offshore oil and gas, and aerospace manufacturing, where robust strength and ease of forming are critical. The tube is also extensively employed in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, as well as industrial and aerospace components, CPI equipment, and piping systems.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. Machining it is straightforward, provided sharp tools are maintained and ample coolant is used. Similar to austenitic stainless steels, the machining process should involve deep, continuous cuts with slow feed rates and speeds to achieve optimal results.
Stock Availability
Daxun Alloys maintains a comprehensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in a wide array of sizes, ready to meet diverse customer needs.
Weight Reduction
CP 2 grade titanium tubes are distinguished by their low density and high strength-to-weight ratio, making them perfect for applications requiring weight reduction without compromising strength. These tubes are cold formable, exhibit excellent ductility, and can be welded using conventional TIG and MIG methods, with inert gas shielding necessary 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), this structure transforms into a beta (body-centered cubic) configuration. The transformation temperature can vary based on impurities or alloying elements, splitting the equilibrium transformation single temperature into alpha and beta zones. Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) for alpha to beta transition and 913°C (1675°F) for beta to alpha transition.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks via hot extrusion or oblique rolling and piercing, followed by multiple cold rolling processes. These tubes maintain continuous perimeters throughout the manufacturing stages. The production process includes sponge titanium vacuum arc melting, ingot blanking for 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 produced from annealed flat-rolled steel plate or strip using the automatic arc welding (TIG) process. The 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. The welded pipes undergo at least one stress relief heat treatment post-forming and welding. Daxun uses no filler materials during the welding process.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034) This titanium tube, extensively used in industrial applications, strikes an ideal balance of moderate strength and excellent ductility. It boasts exceptional corrosion resistance in both highly oxidizing and slightly reducing environments, including chlorides. This makes it perfect for chemical and offshore industries, as well as aircraft manufacturing, where strength and formability are crucial. Additionally, it is utilized in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping solutions.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. It can be easily machined, but it's imperative to keep tools sharp and use ample coolant. Similar to machining austenitic stainless steels, cuts should be deep and continuous, ensuring slow feeds and speeds for optimal results.
Stock Availability
Daxun Alloys maintains a robust inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various dimensions to suit diverse applications.
Weight Reduction
CP 2 grade titanium tubes stand out for their low density and 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 methods, with inert gas shielding required to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium exhibits an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. Around 885°C (1625°F), it transitions to a beta (body-centered cubic) structure. This transformation temperature can vary based on impurities or alloying elements, which also create distinct alpha and beta transformation zones. Typical transformation temperatures for grade 2 titanium are 890°C (1635°F) for the alpha phase and 913°C (1675°F) for the beta phase, with both coexisting between these temperatures.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks via hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling stages. The manufacturing process ensures continuous perimeters at all stages. Key steps include: sponge titanium vacuum arc melting, ingot blanking to obtain hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling and piercing, degreasing, drying, cutting, online annealing and straightening, pickling, multiple cold rolling stages, 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 pipes are produced from annealed flat-rolled steel plates or strips using the automatic arc welding (TIG) method. The main production steps 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. Welded pipes undergo at least one stress relief heat treatment post forming and welding. Daxun ensures no filler materials are used during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) is the quintessential choice in titanium alloys, renowned for its duplex alpha+beta structure. This high-performance alloy employs aluminum as the alpha stabilizer and vanadium as the beta stabilizer, offering exceptional strength that withstands temperatures as low as 800°F (427°C). ATI Ti-6Al-4V, Grade 5 is ideal for critical applications such as compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and high-strength-to-weight ratio forgings.
The alloy undergoes initial melting through advanced techniques including vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). This process may be followed by one or two stages of vacuum arc remelting to achieve the required purity 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 boasts an impressive melting range of 2,800-3,000°F (1,538 - 1,649°C).
Density: 0.160 lb/in³; 4.47 g/cm³, enabling lightweight yet robust applications.
Beta Transus Temperature: 1830°F (± 25°); 999°C (± 14°), ensuring optimal phase transition during heat treatment.
Heat Treatment This titanium alloy can be annealed at 1,700-1,900°F (927 - 1,038°C) to achieve high hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to suit various requirements.
1. Annealing: Heat to 1,275 -1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Maintain at 1,000 -1,200°F (538 - 649°C) for 1 to 8 hours, then air or furnace cool.
3. Solution Heat Treating: Heat to 1,675 -1,750°F (913 - 954°C) for 1 hour, followed by water quenching.
4. Aging: Maintain at 975 -1,025°F (524 - 552°C) for 4 to 8 hours, then air cool for optimal stability.
Optimum Properties Rapid quenching of small cross sections in the solution treated and aged condition yields optimal properties. Larger cross-section sizes or delayed quenching may result in suboptimal characteristics.
HardnessTypical hardness in the annealed state is Rockwell C 30-34. In the solution and aged condition, it reaches approximately Rockwell C 35-39.
Forgeability/Formability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 is forged at 1,750°F (954°C) with a final temperature of 1,450°F (788°C). A minimum reduction of 35% ensures optimal results.
While challenging to form at room temperature-even when annealed-severe forming operations like bending or stretching can be performed on the annealed material up to 1,200°F (649°C) without compromising mechanical properties. Creep forming is applicable for hot sizing or forming at temperatures between 1,000°F and 1,200°F (538 to 649°C).
Machinability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be expertly machined using conventional methods designed for austenitic stainless steels. For optimal results, employ slow speeds, high feeds, and ensure robust tool rigidity. Additionally, utilize copious amounts of non-chlorinated cutting fluids to maintain precision and quality.
Weldability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube boasts excellent weldability when in the annealed, solution-treated, or partially aged conditions. This ensures a versatile approach to welding applications.
Post-weld heat treatment is essential for optimal aging. Exercise caution to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding should be performed within an inert gas-filled chamber or with a protective 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 without a protective atmosphere.
Special Considerations To maintain the superior qualities of the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, avoid hydrogen contamination during improper pickling, and guard against the absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing. Such contaminations could compromise ductility and negatively impact notch sensitivity and formability.
