Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless and welded titanium tubes that exhibit exceptional ductility and cold formability, perfect for deep drawing applications. Grade 1 titanium tubes are celebrated for their excellent general and seawater corrosion resistance, as well as their outstanding resistance to oxidizing, neutral, and slightly reducing media, including chlorides.
Titanium's inherent low density (approximately half that of nickel-based alloys), coupled with its high strength, lightweight nature, and corrosion resistance, makes it an ideal choice for various challenging chemical environments. Compliance standards 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)
Highly favored for industrial applications, Grade 2 titanium tubes offer an excellent balance of moderate strength and good ductility. They provide superior corrosion resistance in both highly oxidizing and slightly reducing environments, including chlorides. These tubes are highly valued in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, and CPI equipment, due to their strength and formability.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. It can be easily machined; however, maintaining sharp tools and liberal use of coolant is crucial. Similar to austenitic stainless steels, machining should involve deep and continuous cuts with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a comprehensive stock of CP 2 Grade Titanium Seamless and Welded Pipes, available in a wide range of sizes.
Weight Reduction
CP 2 grade titanium tubes boast low density and a high strength-to-weight ratio, ideal for applications demanding weight reduction without compromising strength. These tubes are cold formable, exhibit good ductility, and can be welded using standard TIG and MIG processes, although inert gas shielding is essential to avoid weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes possess an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. At around 885°C (1625°F), they transform into a beta (body-centered cubic) structure. The transformation temperature can shift based on impurities or alloying additions. Alloying elements create two distinct temperature zones: the alpha transformation zone, where the alloy is entirely alpha, and the beta transformation zone, where the alloy is entirely beta. Between these temperatures, both alpha and beta forms coexist. 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.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are crafted from hollow blanks through hot extrusion or oblique rolling and piercing, followed by multiple cold rolling stages. Seamless tubes must maintain continuous perimeters throughout manufacturing. The process includes: sponge titanium vacuum arc melting to create ingot blanks, cleaning, cutting, 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 crafted from annealed flat-rolled steel plate or steel strip, utilizing the advanced automatic arc welding (TIG) process. With a meticulous production sequence, Daxun ensures superior quality through stages such as 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 essential stress relief heat treatment post-formation and welding, guaranteeing exceptional reliability. Notably, Daxun employs filler materials during the welding process for enhanced durability.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), represents the pinnacle of titanium alloys. As a duplex alpha+beta titanium alloy, it ingeniously combines aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its high strength, this alloy remains robust even at low temperatures of approximately 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy, is meticulously crafted for annealing, solution treating, and aging, making it indispensable in high-stakes applications such as compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings where a high strength-to-weight ratio is paramount.
The alloy's initial melting process employs cutting-edge techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Following this, remelting is achieved through one or two vacuum arc steps, ensuring unparalleled 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 Properties
Ti-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°F); 999°C (± 14°C)
Heat Treatment
For applications demanding high hardness, tensile, and fatigue strength, the alloy is annealed at 1,700 - 1,900°F (927 - 1,038°C).
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, 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
Rapid quenching of small cross sections in the solution-treated and aged states yields optimal properties. However, larger cross-sections and/or delayed quenching may result in suboptimal properties.
Hardness
In the annealed state, the typical hardness is Rockwell C 30-34, while in the solution-treated and aged state, it ranges from Rockwell C 35-39.
Forgeability/Formability
Introducing the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 - a marvel of material science! This titanium tube is expertly forged at a remarkable 1,750°F (954°C), with a final forging temperature precise at 1,450°F (788°C). For optimal performance, a reduction of at least 35% is recommended, ensuring the highest quality results.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, is renowned for its challenging formability at room temperature, even when annealed. To overcome this, severe forming operations like bending or stretching can be effectively executed on the annealed material at elevated temperatures of up to 1,200°F (649°C) without altering its mechanical properties. For hot sizing or forming, creep forming is a viable option at temperatures between 1,000 to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, offers excellent machinability when approached with the same methods as austenitic stainless steels. Optimal machining is achieved with slow speeds, high feeds, and robust tool rigidity, paired with generous amounts of non-chlorinated cutting fluids.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, exhibits superb weldability in both the annealed and solution plus partially aged conditions. Post-weld aging
is achieved via heat treatment and requires precautions to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding can be conducted in an inert gas-filled chamber or with an inert gas tail shield to protect the molten metal and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding can be performed without a protective atmosphere.
Special Considerations
For the DAXUN Ti-6Al-4V Titanium Tube, Grade 5, special attention must be paid to avoid contamination from hydrogen during improper pickling, as well as absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing. Such contamination may compromise ductility, notch sensitivity, and formability.