Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless titanium tubes and welded titanium tubes, which boast exceptional ductility and cold formability, are perfect for deep drawing. Grade 1 titanium tubes stand out for their excellent general and seawater corrosion resistance, alongside superior resistance to oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's impressively low density (approximately half that of nickel-based alloys), combined with its high strength, light weight, and corrosion resistance, makes it an unparalleled choice for a variety of rigorous chemical environments. Applicable 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)
Widely utilized in industrial applications, Grade 2 titanium tubes strike the perfect balance between moderate strength and reasonable ductility. They offer impeccable corrosion resistance in highly oxidizing and slightly reducing conditions (including chlorides). These tubes deliver excellent performance in the chemical and offshore industries, as well as in aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using conventional methods. It can be easily machined, provided that sharp tools are maintained and a generous amount of coolant is used. Similar to machining austenitic stainless steels, cuts should be deep and continuous with slow feeds and speeds.
Stock Availability
Daxun Alloys maintains a stock of CP 2 Grade Titanium Seamless and Welded Pipes in a range of sizes.
Weight Reduction
CP 2 grade titanium tubes, known for their low density and high strength-to-weight ratio, are ideal for applications demanding weight reduction without compromising on strength. These tubes are cold formable, possess good ductility, and can be welded using standard TIG and MIG processes, with the prerequisite of inert gas shielding to prevent embrittlement in the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes exhibit an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. At roughly 885°C [1625°F], the structure transitions to beta (body-centered cubic). This transformation temperature can vary based on impurities or alloying additions. Alloying elements shift the single temperature of the equilibrium transformation into two distinct zones: the alpha transformation zone, below which the alloy is entirely alpha, and the beta transformation zone, above which the alloy is fully beta. Between these temperatures, both alpha and beta forms coexist. Typical 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 meticulously crafted from hollow blanks via hot extrusion or oblique rolling and piercing processes, followed by extensive cold rolling stages. Titanium seamless tubes must maintain continuous perimeters throughout the manufacturing process. The production sequence includes: sponge titanium vacuum arc melting, ingot blanking to obtain 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 meticulously crafted from annealed flat-rolled steel plates or steel strips using the automatic arc welding (TIG) process. The comprehensive production phases 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. Every welded pipe must undergo at least one stress relief heat treatment post-forming and welding. Daxun ensures no filler materials are used during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) stands as the most sought-after titanium alloy. This duplex alpha+beta alloy utilizes aluminum as the alpha stabilizer and vanadium as the beta stabilizer, showcasing remarkable strength at temperatures as low as 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging. It finds applications in compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings, all requiring a superior strength-to-weight ratio.
The alloy is initially melted using advanced techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM), followed by remelting in one or two vacuum arc steps.
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) to achieve high hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube can undergo various heat treatment processes.
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
Small cross sections with rapid quenching exhibit superior properties in the solution treated and aged condition. Larger cross-sections or delayed quenching may lead to suboptimal properties.
Hardness
Typical hardness ranges from Rockwell C 30-34 in the annealed condition to approximately Rockwell C 35-39 in the solution-treated and aged condition.
Forgeability/Formability
Introducing the DAXUN Ti-6Al-4V Titanium Tube, a superior Grade 5 Titanium Tube that undergoes forging at a robust 1,750°F (954°C) and a final forging temperature of 1,450°F (788°C). For optimal performance, a reduction of at least 35% is highly recommended.
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exhibits significant resistance to forming at room temperature, even when annealed. However, at elevated temperatures of up to 1,200°F (649°C), severe forming operations like bending or stretching can be executed without altering its mechanical properties. Creep forming is an excellent technique for hot sizing or shaping at temperatures between 1,000 to 1,200°F (538 to 649°C).
Enhanced Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube offers excellent machinability using methods suitable for austenitic stainless steels. Employ slow speeds, high feeds, and ensure good tool rigidity while utilizing ample non-chlorinated cutting fluids for best results.
Superior Weldability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube demonstrates high weldability in both annealed and solution or partially aged conditions, with aging.
performed during post-weld heat treatment. To avoid contamination with oxygen, nitrogen, and hydrogen, fusion welding is ideally conducted in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding are feasible without a protective atmosphere.
Key Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube may face contamination risks from hydrogen due to improper pickling and the absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can compromise ductility, notch sensitivity, and formability.
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