Daxun Alloy's pure titanium Grade 1 titanium tubes include:
seamless titanium tubes and welded titanium tubes, which exhibit 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 their superior resistance to oxidizing, neutral, and slightly reducing media (solutions) including chlorides.
Titanium's low density-approximately half that of nickel-based alloys-combined with its high strength, light weight, and exceptional corrosion resistance, makes it an unparalleled choice for a variety of harsh chemical environments. Our tubes adhere to the highest industry standards, including ASTM B338, ASTM B265, ASME SB265, ASTM F67, ISO 5832-2, 3.7025, and UNS R50250.
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
This grade is the most frequently used titanium tube for industrial applications, offering a remarkable balance of moderate strength and excellent ductility. It provides outstanding corrosion resistance in highly oxidizing and slightly reducing conditions, including chlorides. It is favored in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping.
Fabrication
Titanium Grade 2 is highly amenable to cold forming using standard techniques. It can be easily machined, but it requires sharp tools and abundant use of coolant. Similar to machining austenitic stainless steels, cuts should be deep and continuous with slow feed rates and speeds.
Stock Availability
Daxun Alloys maintains a comprehensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes to meet diverse project needs.
Weight Reduction
CP 2 grade titanium tubes boast a low density and an impressive strength-to-weight ratio, making them ideal for applications demanding weight reduction without compromising on strength. They are cold formable, exhibit good ductility, and can be welded using conventional TIG and MIG processes, provided appropriate inert gas shielding is used to prevent weld zone embrittlement.
Crystal Structure
At ambient temperature, ASTM B338 Grade 2 titanium tube exhibits an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Around 885°C [1625°F], it transitions to a beta (body-centered cubic) structure. The transformation temperature can be modified by the type and amount of impurities or alloying additions. Alloying elements create two distinct temperature zones for the equilibrium transformation: the alpha zone, below which the alloy remains all alpha, and the beta 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 meticulously crafted from hollow blanks via a hot extrusion process or oblique rolling and piercing. This is followed by multiple cold rolling stages. Throughout all manufacturing phases, these seamless tubes maintain continuous perimeters. The comprehensive production process includes: vacuum arc melting of sponge titanium, 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, final 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 meticulously crafted from annealed flat-rolled steel plate or steel strip, utilizing an advanced automatic arc welding (TIG) process. The comprehensive production process encompasses several stages: uncoiling, shearing, butt welding, cleaning, pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing and sizing, straightening, another round of eddy current testing, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. Each welded pipe undergoes stringent stress relief heat treatment post-formation and welding. Notably, Daxun refrains from using filler materials during the welding process, ensuring the integrity and purity of the pipe.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
The DAXUN Ti-6Al-4V Titanium Tube, recognized as Grade 5 (UNS R56400), stands as the most renowned titanium alloy. This duplex alpha+beta titanium alloy incorporates aluminum as the alpha stabilizer and vanadium as the beta stabilizer, resulting in a high-strength material capable of operating at low temperatures up to approximately 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is versatile, being ideal for annealing, solution treating, and aging processes. Its prominent applications include compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings requiring a high strength-to-weight ratio.
Initially, the alloy undergoes melting using vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM) techniques. This is followed by remelting, performed in one or two vacuum arc steps to ensure 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 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) when high hardness, tensile strength, and fatigue strength are required.
The DAXUN 6-4 Grade 5 Titanium Tube is amenable to various heat treatments for optimal performance.
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, followed by air or furnace cooling.
3. Solution Heat Treating: 1,675-1,750°F (913-954°C) for 1 hour, followed by water quenching.
4. Aging: 975-1,025°F (524-552°C) for 4 to 8 hours, followed by air cooling.
Optimum Properties Smaller cross-sections achieve rapid quenching in the solution-treated and aged condition, whereas larger cross-sections or delayed quenching may yield sub-optimal properties.
HardnessTypically, the hardness in the annealed condition ranges between Rockwell C 30-34, and in the solution-treated and aged condition, it ranges between Rockwell C 35-39.
Forgeability/Formability Introducing the DAXUN Ti-6Al-4V Titanium Tube, Grade 5! This top-tier Titanium tube is forged with precision at 1,750°F (954°C) and undergoes a final forging at 1,450°F (788°C). For optimal performance and integrity, a reduction of at least 35% is highly recommended.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, presents challenges in forming at room temperature, even when annealed. For exceptional results, severe forming operations such as bending or stretching should be conducted on the annealed material at temperatures up to 1,200°F (649°C) without altering its mechanical properties. Creep forming is ideal for hot sizing or forming within the temperature range of 1,000 to 1,200°F (538 to 649°C).
Machinability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, boasts excellent machinability. Employ traditional austenitic stainless steel machining methods with slow speeds, high feeds, robust tool rigidity, and an ample supply of non-chlorinated cutting fluids to achieve superior results.
Weldability Effortlessly weld the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, whether in the annealed or solution and partially aged conditions. Post-weld aging enhances its properties.
Post-weld heat treatment helps achieve desired aging. However, it is crucial to prevent contamination by oxygen, nitrogen, and hydrogen. Utilize fusion welding in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones. Spot welding, seam welding, and flash welding are feasible without a protective atmosphere.
Special Considerations Be aware that the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, may absorb hydrogen during improper pickling and oxygen, nitrogen, and carbon during forging, heat treating, brazing, etc. Such contamination can diminish ductility and adversely affect notch sensitivity and formability.