Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless and welded titanium tubes, which showcase outstanding ductility and cold formability, perfect for deep drawing. Grade 1 titanium tubes are celebrated for their exceptional general and seawater corrosion resistance, along with superior resistance to oxidizing, neutral, and slightly reducing media (solutions) including chlorides.
Titanium's low density (about half that of nickel-based alloys), remarkable strength, lightweight nature, and exceptional corrosion resistance make 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)
The most commonly utilized titanium tube for industrial applications, Grade 2 offers an exemplary balance of moderate strength and excellent ductility. It boasts outstanding corrosion resistance in highly oxidizing and slightly reducing environments (including chlorides). Grade 2 titanium is extensively used in the chemical, offshore, and aircraft industries, as well as in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping.
Fabrication
Titanium Grade 2 excels in cold forming through standard techniques. It is highly machinable, although maintaining sharp tools and ample coolant use is crucial. Similar to machining austenitic stainless steels, deep, continuous cuts with slow feeds and speeds are recommended.
Stock Availability
Daxun Alloys maintains an extensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes.
Weight Reduction
CP 2 Grade Titanium Tubes feature low density and a high strength-to-weight ratio, making them ideal for weight-sensitive applications without compromising strength. They are cold formable, exhibit excellent ductility, and can be welded using traditional TIG and MIG methods, though inert gas shielding is necessary to avoid weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube has an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. Around 885°C (1625°F), it transforms to a beta (body-centered cubic) structure. This transformation temperature may vary with the type and amount of impurities or alloying elements. Alloying additions also divide the singular transformation temperature into two distinct zones: the alpha transformation zone (entirely alpha below this temperature) and the beta transformation zone (entirely beta above this temperature). Between these two zones, both alpha and beta forms coexist. Typical transformation temperatures for grade 2 titanium are 890°C (1635°F) for alpha and 913°C (1675°F) for beta.
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 processes, followed by multiple cold rolling processes. The seamless tubes maintain continuous perimeters throughout manufacturing. The comprehensive manufacturing process includes: sponge titanium vacuum arc melting, 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, straightening, cutting, pickling, final inspection, marking (DAXUN), and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's Grade 2 ASTM B338 titanium welded pipe is meticulously crafted from annealed flat-rolled steel plate or steel strip through an automatic tungsten inert gas (TIG) welding process. Our state-of-the-art production pipeline includes: 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 at least one stress relief heat treatment post-formation and welding. Notably, Daxun utilizes filler materials during the welding process to ensure optimal strength and durability.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium Alloy - (UNS R56400)
Introduction
DAXUN's Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400), stands as the premier titanium alloy. This duplex alpha+beta titanium alloy incorporates aluminum as an alpha stabilizer and vanadium as a beta stabilizer, offering exceptional strength even at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging. 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 demanding a high strength-to-weight ratio.
The alloy is initially melted using advanced techniques such as vacuum arc remelting (VAR), electron beam (EB), or plasma arc hearth melting (PAM), followed by one or two stages of vacuum arc remelting 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: 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's Grade 5 Titanium Tube can be subjected to a variety of heat treatment methods to suit different requirements.
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 Optimal properties are achieved in small cross-sections with rapid quenching during the solution treated and aged condition. Larger cross-sections or delayed quenching might yield less optimal properties.
HardnessTypical hardness ranges from Rockwell C 30-34 when annealed to Rockwell C 35-39 in the solution and aged condition.
Forgeability/Formability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube exhibits remarkable forgeability, reaching optimal results when forged at 1,750°F (954°C) and finalized at 1,450°F (788°C). For superior performance, a reduction of at least 35% is advised.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges in forming at room temperature, even after annealing. Consequently, severe forming operations like bending or stretching are achievable on annealed material when heated up to 1,200°F (649°C) without impacting mechanical properties. Creep forming is suitable for hot sizing or forming at temperatures between 1,000 and 1,200°F (538 to 649°C).
Machinability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be machined effectively using methods for austenitic stainless steels. Optimal machining involves slow speeds, high feeds, robust tool rigidity, and ample non-chlorinated cutting fluids.
Weldability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube demonstrates excellent weldability in both the annealed and solution/partially aged states, with aging achieved through post-weld heat treatment.
To prevent contamination with oxygen, nitrogen, and hydrogen, precise precautions are necessary. Fusion welding should be conducted within an inert gas-filled chamber or utilizing an inert gas tail shield over the molten metal and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding are all feasible without a protective atmosphere.
Special Considerations DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube requires careful handling to avoid hydrogen contamination from improper pickling and absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can diminish ductility and negatively affect notch sensitivity and formability.