Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
This is the most commonly utilized titanium tube in industrial applications, offering an impeccable balance of moderate strength and commendable ductility. It excels in corrosion resistance under both highly oxidizing and mildly reducing conditions, including exposure to chlorides. Its robust corrosion protection makes it indispensable in the chemical and offshore industries, as well as in aircraft manufacturing where strength and ease of forming are paramount. Furthermore, it is widely applied in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping solutions.
Fabrication
Titanium Grade 2 adapts well to cold forming via standard techniques. It can be readily machined, although maintaining sharp tools and liberal coolant application are crucial. Similar to machining austenitic stainless steels, cuts should be deep and continuous, with slow feeds and speeds to optimize results.
Stock Availability
Daxun Alloys offers CP 2 Grade Titanium Seamless and Welded Pipes available in diverse sizes.
Weight Reduction
CP 2 grade titanium tubes boast a low density and a superior 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, needing inert gas shielding to avert weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube features 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 fluctuate based on impurities or alloying additions. Alloying elements can also divide the single equilibrium transformation temperature into two distinct 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) 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 processes, followed by multiple cold rolling stages. These seamless tubes maintain continuous perimeters throughout manufacturing. The seamless tube production encompasses: sponge titanium vacuum arc melting, ingot blanking for hollow blanks, cleaning, cutting, 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 pipes are produced from annealed flat-rolled steel plate or steel strip using an automatic arc welding (TIG) process. The primary 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.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034) This highly versatile titanium tube is the go-to choice for industrial applications, balancing moderate strength with impressive ductility. Renowned for its exceptional corrosion resistance in environments from highly oxidizing to mildly reducing (including chlorides), it is indispensable for industries such as chemical processing, offshore operations, and aircraft manufacturing, where strength and formability are paramount. Additionally, it excels 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 conventional techniques. Machinability is straightforward, provided that tools remain sharp and coolant is generously applied. As with austenitic stainless steels, machining should involve deep, continuous cuts at slow feeds and speeds for optimal results.
Stock Availability
Jiangsu Daxun Alloy Co., Ltd. offers an extensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes, ready to meet diverse industrial requirements.
Weight Reduction
CP 2 grade titanium tubes boast a low-density yet high strength-to-weight ratio, ideal for applications demanding weight reduction without compromising strength. These tubes are cold formable, weldable using standard TIG and MIG processes, and require inert gas shielding to maintain weld integrity and prevent 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. Around 885°C (1625°F), a transformation to a beta (body-centered cubic) structure occurs. This transformation temperature can be influenced by impurities or alloying elements, which also create distinct alpha and beta transformation zones. In Grade 2 titanium, typical transformation temperatures are 890°C (1635°F) for alpha and 913°C (1675°F) for beta.
Grade 2 Titanium Seamless Pipe Manufacturing Process
At Jiangsu Daxun Alloy Co., Ltd., Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks using hot extrusion or oblique rolling and piercing, followed by multiple cold rolling stages. The process ensures a continuous perimeter at all stages and includes: sponge titanium vacuum arc melting, ingot blanking, cleaning, cutting, hot extrusion or oblique rolling with piercing, degreasing, drying, online annealing, straightening, pickling, cold rolling, vacuum annealing, final inspection, marking (DAXUN), and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium welded pipes are crafted from annealed flat-rolled steel plates or strips using the automatic TIG (arc welding) process. Key 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, multiple tests (eddy current, ultrasonic, hydrostatic), and final inspection and packaging. Each welded pipe undergoes stress relief heat treatment post-forming and welding to ensure optimal performance.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) emerges as the industry's most sought-after titanium alloy. As a duplex alpha+beta titanium alloy, it ingeniously combines aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This alloy's remarkable strength is maintained even at low temperatures of around 800°F (427°C). Ideal for applications requiring annealing, solution treating, and aging, the ATI Ti-6Al-4V, Grade 5 alloy is a cornerstone for compressor blades, disks, and rings in jet engines, fuselage and space capsule components, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and other critical forgings, thanks to its high strength-to-weight ratio.
The alloy's initial melting process employs advanced techniques like vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). The remelting process is refined through one or two sophisticated vacuum arc steps, ensuring the highest 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 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 Annealing at 1,700-1,900°F (927 - 1,038°C) is employed when high hardness, tensile strength, and fatigue strength are paramount.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options tailored to diverse application needs.
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, then air or furnace cooling.
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by a water quench.
4. Aging: 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, then air cooling.
Optimum Properties Achieving optimal properties requires rapid quenching of small cross sections in the solution treated and aged condition. Larger cross-sections or delayed quenching may lead to less than optimal results.
HardnessTypical hardness in the annealed state ranges from Rockwell C 30-34, whereas in the solution treated and aged condition, it reaches approximately Rockwell C 35-39.
Forgeability/Formability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exhibits excellent forgeability at 1,750°F (954°C) with a final forging temperature of 1,450°F (788°C). A minimum reduction of 35% is recommended to achieve superior results.
Forming the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube at room temperature is challenging, even in its annealed state. For severe forming operations such as bending or stretching, performing these tasks on the annealed material at temperatures up to 1,200°F (649°C) preserves its mechanical properties. Additionally, creep forming is a viable method for hot sizing or forming at temperatures between 1,000 to 1,200°F (538 to 649°C).
Enhanced Machinability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube features exceptional machinability. Utilizing machining techniques for austenitic stainless steels, this titanium tube benefits from slow speeds, high feeds, superior tool rigidity, and the application of ample non-chlorinated cutting fluids, ensuring precision and efficiency.
Superior Weldability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exhibits outstanding weldability in both annealed and solution-aged conditions. The welding process is further optimized during post-weld heat treatment, maintaining structural integrity.
It is vital to take precautions to prevent contamination with oxygen, nitrogen, and hydrogen. Fusion welding can be performed within an inert gas-filled chamber or using an inert gas tail shield over the molten metal and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding can also be executed without the need for a protective atmosphere.
Important Special Considerations DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube requires careful handling to prevent contamination with hydrogen during improper pickling and the absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination could potentially reduce ductility and affect notch sensitivity and formability, so stringent quality control measures are essential.
