Daxun Alloy's pure titanium Grade 1 titanium tubes include:
Our seamless and welded titanium tubes stand out for their superior ductility and cold formability, making them perfect for deep drawing. Renowned for their excellent general and seawater corrosion resistance, Grade 1 titanium tubes also offer formidable resistance to oxidizing, neutral, and slightly reducing media, including chlorides.
Titanium's impressive attributes of low density (roughly half that of nickel-based alloys), high strength, light weight, and exceptional corrosion resistance establish it as an optimal choice for numerous harsh chemical environments. Our products adhere to stringent standards: 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 recognized for industrial applications, Grade 2 titanium tubes strike the perfect balance of moderate strength and ductility. They excel in corrosion resistance under both highly oxidizing and slightly reducing conditions, including chlorides. These tubes are commonly used in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, CPI equipment, and various industrial and aerospace components.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard methods. It can be easily machined, provided that sharp tools are maintained and ample 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 an extensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in diverse sizes.
Weight Reduction
Grade 2 CP titanium tubes are characterized by their low density and high strength-to-weight ratio, making them ideal for applications demanding weight reduction without compromising strength. They offer excellent cold formability, good ductility, and compatibility with standard TIG and MIG welding processes, requiring inert gas shielding to avoid weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tubes exhibit an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Around 885°C (1625°F), this structure transitions to a beta (body-centered cubic) form. The transformation temperature varies with the type and amount of impurities or alloying elements, which can also split the single equilibrium transformation temperature into two zones: the alpha transformation zone (below which the alloy remains all alpha) and the beta transformation zone (above which the alloy is all beta). Between these zones, both alpha and beta structures coexist, with typical transformation temperatures for Grade 2 titanium being approximately 890°C (1635°F) and 913°C (1675°F).
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks using hot extrusion or oblique rolling and piercing, followed by multiple cold rolling processes. The seamless tubes maintain continuous perimeters throughout manufacturing. The process includes: vacuum arc melting of sponge titanium, ingot blanking to obtain hollow blanks, cleaning, cutting, and feeding for 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 exemplifies unmatched quality, made from annealed flat-rolled steel plate or strip through an automatic TIG arc welding process. The meticulous production stages 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. Each welded pipe undergoes a stress relief heat treatment post-forming and welding. Importantly, Daxun ensures that no filler materials are used during the welding process, maintaining the integrity and purity of the pipes.
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 favored titanium alloy, celebrated for its duplex alpha+beta composition. Utilizing aluminum as the alpha stabilizer and vanadium as the beta stabilizer, this high-strength alloy excels even at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is crucial for processes like 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 other critical forgings demanding a high 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). Following the initial melting, remelting is carried out in one or two vacuum arc steps to refine the material further.
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 exceptional hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to meet various requirements.
1. Annealing: Heat at 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Heat at 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, then air or furnace cool.
3. Solution Heat Treating: Heat at 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by water quenching.
4. Aging: Heat at 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, then air cool.
Optimum Properties
For the best results, small cross sections should be rapidly quenched in the solution treated and aged condition. Larger cross-sections or delayed quenching may yield less than optimal properties.
Hardness
Typical hardness in the annealed condition is Rockwell C 30-34, while in the solution treated and aged condition, it reaches approximately Rockwell C 35-39.
Exceptional Forgeability and Formability
The DAXUN Ti-6Al-4V Titanium Tube, also known as the Grade 5 Titanium Tube, exhibits outstanding forgeability. It is optimally forged at a high temperature of 1,750°F (954°C) with a crucial final forging temperature of 1,450°F (788°C). To achieve the best results, a reduction of at least 35% is recommended.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges when forming at room temperature, even post-annealing. To perform severe forming operations, such as bending or stretching, the annealed material can be heated up to 1,200°F (649°C) without compromising its mechanical properties. Creep forming is an excellent method for hot sizing or forming at temperatures ranging from 1,000 to 1,200°F (538 to 649°C).
Superior Machinability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube offers excellent machinability. It can be machined using techniques similar to those for austenitic stainless steels, ensuring optimal results with slow speeds, high feeds, robust tool rigidity, and the application of ample non-chlorinated cutting fluids.
Exceptional Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is highly weldable in both the annealed and solution-aged conditions. To achieve optimal aging,
a post-weld heat treatment is recommended. Precautionary measures are essential to prevent contamination by oxygen, nitrogen, and hydrogen. Fusion welding should be performed in an inert gas-filled chamber or with an inert gas tail shield covering the molten metal and adjacent hot zones. Additionally, spot welding, seam welding, and flash welding can be executed without the need for a protective atmosphere.
Critical Considerations
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is susceptible to contamination from hydrogen due to improper pickling and from the absorption of oxygen, nitrogen, and carbon during forging, heat treating, brazing, and other processes. This contamination can lead to reduced ductility and negatively impact notch sensitivity and formability.
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