Daxun Alloy's pure titanium Grade 1 titanium tubes include:
seamless titanium tubes and welded titanium tubes, which have excellent ductility and cold formability, and are ideal for deep drawing. Grade 1 titanium tubes are known for their good general and seawater corrosion resistance and excellent resistance to oxidizing, neutral and slightly reducing media (solutions) (including chlorides).
Titanium's low density (about half that of nickel-based alloys), high strength, light weight and corrosion resistance make it an excellent choice for a variety of harsh chemical conditions. Execution standards are: 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 is the most often used titanium tube for industrial applications, providing a superb balance of moderate strength and reasonable ductility. It offers excellent corrosion resistance in both highly oxidising and slightly reducing conditions (including chlorides). It provides good corrosion protection in the chemical and offshore industries, as well as aircraft manufacture, where strength and ease of forming are required. It's also utilised in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 responds well to cold forming using standard methods. It can be readily machined, but special attention must be paid to maintaining 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.
Stock Availability
Daxun Alloys stocks CP 2 Grade Titanium Seamless and Welded Pipes in a variety of sizes.
Weight Reduction
CP 2 grade titanium tubes have low density and a high strength-to-weight ratio, making them suitable for applications where weight reduction is required without sacrificing overall strength. They are cold formable, have good ductility, and can be welded using conventional TIG and MIG processes, although inert gas shielding is required to prevent embrittlement of the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube has an alpha (hexagonal close-packed) crystal structure, just like commercially pure titanium grades 1 and 3. At about 885°C [1625°F], it transforms to a beta (body-centered cubic) structure. This transformation temperature can be increased or decreased depending on the type and amount of impurities or alloying additions. The addition of alloying elements also divides the single temperature of the equilibrium transformation into two temperature 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 two temperatures, both alpha and beta forms exist. Typical alpha and beta 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 made from hollow blanks by hot extrusion process or oblique rolling and piercing process, followed by multiple cold rolling processes. Titanium seamless tubes should have continuous perimeters at all stages of the manufacturing operation. The de novo manufacturing of titanium seamless tubes mainly includes: sponge titanium vacuum arc melting ingot blanking to get hollow blanks cleaning cutting and feeding 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 pipe is engineered from annealed flat-rolled steel plate or steel strip utilizing the advanced automatic arc welding (TIG) process. The meticulous production stages involve: 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. Every welded pipe undergoes a crucial stress relief heat treatment post-forming and welding. Notably, Daxun refrains from using any filler materials 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) stands as the premier choice among titanium alloys. This duplex alpha+beta titanium alloy is fortified with aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its high strength, this alloy performs exceptionally well at temperatures as low as 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 process employs vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting is conducted through one or two vacuum arc steps.
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: 1,830°F (± 25°); 999°C (± 14°)
Heat Treatment Annealed at 1,700-1,900°F (927 - 1,038°C) for achieving optimal hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options.
1. Annealing: 1,275 - 1,400°F; (691 - 760°C), ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: 1,000 - 1,200°F; (538 - 649°C), 1 to 8 hours, then air or furnace cooling.
3. Solution Heat Treating: 1,675 - 1,750°F; (913 - 954°C), 1 hour, with a subsequent water quench.
4. Aging: 975 - 1,025°F; (524 - 552°C), 4 to 8 hours, followed by air cooling.
Optimum Properties Rapid quenching of small cross-sections achieves optimal properties in solution-treated and aged conditions. However, larger cross-section sizes or delays in quenching may result in suboptimal properties.
HardnessTypical hardness ranges: Rockwell C 30-34 in the annealed condition and approximately Rockwell C 35-39 in the solution-treated and aged condition.
Forgeability/Formability Experience the superior engineering of DAXUN's Ti-6Al-4V Titanium Tube, Grade 5. Expertly forged at a high precision temperature of 1,750°F (954°C) and finished at 1,450°F (788°C), achieving a remarkable reduction of at least 35% to ensure optimal performance and uncompromised quality.
DAXUN's Ti-6Al-4V Titanium Tube, Grade 5, presents a challenge to form at room temperature, even when annealed. For more intensive forming operations such as bending or stretching, the material can be efficiently worked at temperatures up to 1,200°F (649°C) without altering its mechanical integrity. Utilize creep forming for hot sizing or shaping within the ranges of 1,000 to 1,200°F (538 to 649°C) for superior results.
Machinability DAXUN's Ti-6Al-4V Titanium Tube, Grade 5, is designed to be machined with the precision methods used for austenitic stainless steels. Employ slow speeds, high feeds, robust tool rigidity, and ensure the use of copious amounts of non-chlorinated cutting fluids to achieve exceptional machining results.
Weldability DAXUN's Ti-6Al-4V Titanium Tube, Grade 5, boasts excellent weldability in both annealed and solution-aged conditions. The aging process is seamlessly performed during post-weld heat treatment. Ensure stringent precautions to prevent contamination with oxygen, nitrogen, and hydrogen.
Fusion welding of DAXUN's Ti-6Al-4V Titanium Tube can be expertly conducted in an inert gas-filled chamber or with an inert gas tail shield, protecting the molten metal and adjacent hot zones from contamination. Spot welding, seam welding, and flash welding are all achievable without a protective atmosphere, ensuring versatility and ease of use.
Special Considerations DAXUN's Ti-6Al-4V Titanium Tube, Grade 5, requires meticulous handling to prevent contamination from hydrogen due to improper pickling or from the absorption of oxygen, nitrogen, and carbon during processes such as forging and heat treating. Such contamination can adversely impact ductility while affecting notch sensitivity and formability.