Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless titanium tubes and welded titanium tubes, renowned for their exceptional ductility and cold formability, are perfect for deep drawing applications. Grade 1 titanium tubes offer outstanding general corrosion resistance, particularly in seawater, and exhibit excellent 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 corrosion resistance, makes it a superb choice for demanding 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)
The most widely used titanium tube for industrial applications, Grade 2 offers a perfect balance of moderate strength and reasonable ductility. It provides excellent corrosion resistance in both highly oxidizing and slightly reducing conditions (including chlorides). Ideal for chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, CPI equipment, and pipes, where strength and ease of forming are essential.
Fabrication
Titanium Grade 2 responds exceptionally well to cold forming using standard methods. It can be readily machined, but it is crucial to maintain sharp tools and use liberal amounts of coolant. Similar to machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a robust inventory 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, making them perfect for applications demanding weight reduction without compromising strength. These tubes are cold formable, exhibit good ductility, and can be welded using conventional TIG and MIG processes, although inert gas shielding is necessary to prevent embrittlement of the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes feature an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. At approximately 885°C (1625°F), this structure transitions to a beta (body-centered cubic) structure. The transition temperature can vary depending on impurities or alloying additions, which also create distinct alpha and beta transformation zones. Typically, Grade 2 titanium's 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 produced 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 the manufacturing process. Key steps include: sponge titanium vacuum arc melting, ingot blanking for hollow blanks, cleaning, cutting, and feeding, followed by 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 meticulously crafted from annealed flat-rolled steel plate or steel strip through an advanced automatic arc welding (TIG) process. The comprehensive production processes encompass: 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. These welded pipes undergo a minimum of one stress relief heat treatment post-forming and welding, ensuring optimal strength and durability. Notably, Daxun does not employ any filler materials during the welding procedure.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) is the premier choice in titanium alloys. This duplex alpha+beta titanium alloy leverages aluminum as the alpha stabilizer and vanadium as the beta stabilizer, making it a high-strength option suitable for low-temperature applications up to 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is pivotal for annealing, solution treating, and aging processes. Its applications are extensive, including compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings, all demanding a superior strength-to-weight ratio.
The alloy's production begins with initial melting via vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM), followed by one or two stages of vacuum arc remelting.
Specifications
• ASTE 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: 1830°F (± 25°); 999°C (± 14°)
Heat Treatment
Annealed at 1,700-1,900°F (927 - 1,038°C) for maximized hardness, tensile strength, and fatigue resistance.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options.
1. Annealing: 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, air or furnace cooling.
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, 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, air cooling.
Optimum Properties
Optimal properties are achieved with small cross sections and rapid quenching in the solution treated and aged condition. Larger cross-sections or delayed quenching may result in suboptimal properties.
Hardness
The typical hardness is Rockwell C 30-34 in the annealed state and Rockwell C 35-39 in the solution and aged state.
Forgeability/Formability
The DAXUN Ti-6Al-4V Titanium Tube, known as Grade 5 Titanium Tube, is meticulously forged at an impressive temperature of 1,750°F (954°C), with the final forging temperature refined to 1,450°F (788°C). For optimal outcomes, we recommend a reduction of at least 35%.
Our DAXUN Ti-6Al-4V Titanium Tube, Grade 5, presents challenges when forming at room temperature-even after annealing. However, dramatic forming operations like bending or stretching can still be performed on the annealed material at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical integrity. For hot sizing or forming, creep forming is effective within a temperature range of 1,000 to 1,200°F (538 to 649°C).
Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, can be precisely machined using techniques similar to those for austenitic stainless steels. This involves slow speeds, high feed rates, robust tool rigidity, and the application of substantial amounts of non-chlorinated cutting fluids to ensure precision and finish.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, demonstrates excellent weldability whether in an annealed state or solution and partially aged conditions.
Post-weld heat treatment completes the aging process. It's crucial to prevent contamination from oxygen, nitrogen, and hydrogen. For fusion welding, inert gas environments-either within a gas-filled chamber or via an inert gas tail shield-are essential for protecting the molten metal and adjacent hot zones. Additionally, spot welding, seam welding, and flash welding are feasible without protective atmospheres.
Special Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, may risk contamination from hydrogen during improper pickling, as well as absorption of oxygen, nitrogen, and carbon during forging, heat treating, and brazing processes. Such contamination can adversely affect ductility, notch sensitivity, and formability.
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