Daxun Alloy's exceptional Grade 1 pure titanium tubes encompass:
seamless titanium tubes and welded titanium tubes. Renowned for their outstanding ductility and cold formability, these tubes are ideally suited for deep drawing applications. Grade 1 titanium tubes are celebrated for their superior general and seawater corrosion resistance, as well as their excellent performance in oxidizing, neutral, and mildly reducing media (solutions), including chlorides.
With its low density-approximately half that of nickel-based alloys-combined with high strength, light weight, and remarkable corrosion resistance, titanium excels in a multitude of harsh chemical environments. The execution 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 regarded as the titanium tube of choice for industrial applications, Grade 2 offers an exceptional balance of moderate strength and impressive ductility. Its excellent corrosion resistance is effective in highly oxidizing and slightly reducing conditions, including chlorides. This versatility makes it invaluable in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and piping systems.
Fabrication
Titanium Grade 2 adapts seamlessly to cold forming using standard methods. It is readily machinable, though maintaining sharp tools and using liberal coolant is essential. Similar to machining austenitic stainless steels, cuts need to be deep and continuous, with controlled feeds and speeds.
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 offer an impressive low density and high strength-to-weight ratio, making them perfect for applications demanding weight reduction without compromising on strength. These tubes are cold formable and boast good ductility. They can be welded using conventional TIG and MIG processes, though inert gas shielding is necessary to prevent 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 shifts to a beta (body-centered cubic) form. This transformation temperature can vary based on impurities or alloying additions. Alloying elements also distinguish the transformation into two temperature zones: the alpha transformation zone, below which the alloy remains all alpha, and the beta transformation zone, above which the alloy is entirely beta. In between, both alpha and beta forms coexist. Typical alpha and beta 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 undergo a meticulous manufacturing process. Starting from hollow blanks, they are formed using hot extrusion or oblique rolling and piercing, followed by multiple cold rolling stages. These tubes maintain continuous perimeters at every manufacturing stage. The comprehensive titanium seamless tube production includes: sponge titanium vacuum arc melting, ingot blanking to create hollow blanks, cleaning, cutting and 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 meticulously crafted from annealed flat-rolled steel plate or steel strip, utilizing the advanced automatic arc welding (TIG) process. Our production cycle includes an array of precise steps: 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. Post-forming and welding, all welded pipes undergo essential stress relief heat treatment. Notably, Daxun employs exclusive filler materials during welding to ensure exceptional quality.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
Introducing the DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) - the titan among titanium alloys. This duplex alpha+beta alloy ingeniously combines aluminum as the alpha stabilizer with vanadium as the beta stabilizer. Renowned for its high strength, this alloy performs remarkably at low temperatures, around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 is versatile, perfect for annealing, solution treating, and aging. Its applications are vast, including compressor blades, disks, and rings for jet engines, fuselage and space capsule components, pressure vessels, *** cases, helicopter rotor hubs, fasteners, and critical forgings requiring a high strength-to-weight ratio.
The alloy's journey begins with an initial melt using vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Remelting is meticulously achieved in one or two vacuum arc steps, ensuring unparalleled purity and consistency.
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: 1,830°F (± 25°); 999°C (± 14°)
Heat Treatment
Titanium tubes from DAXUN can be annealed at temperatures ranging from 1,700 - 1,900°F (927 - 1,038°C) to achieve superior hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube is subject to diverse heat treatment methods to meet various 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, concluded with a water quench.
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 in the solution-treated and aged condition. However, larger cross-sections and/or delayed quenching may result in suboptimal properties.
Hardness
Typical hardness in the annealed condition achieves Rockwell C ratings of 30-34, and approximately Rockwell C ratings of 35-39 in the solution-treated and aged condition.
Forgeability/Formability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is expertly forged at an impressive 1,750°F (954°C), concluding at a precise 1,450°F (788°C). To achieve optimal results, a reduction of no less than 35% is advised.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges in forming at ambient temperatures, even post-annealing. Hence, extensive forming operations, such as bending or stretching, can be effectively executed on the annealed material at elevated temperatures up to 1,200°F (649°C) without compromising its mechanical integrity. Additionally, creep forming is ideal for hot sizing or forming within a temperature range of 1,000 to 1,200°F (538 to 649°C).
Machinability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be precisely machined using techniques akin to those for austenitic stainless steels. This involves slow speeds, high feeds, ensuring tool rigidity, and employing ample amounts of non-chlorinated cutting fluids.
Weldability
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube offers excellent weldability, both in annealed as well as in solution and partially aged conditions, with aging
achievable during post-weld heat treatment. It is crucial to prevent contamination from oxygen, nitrogen, and hydrogen. Fusion welding can be performed in an inert gas-filled chamber or using an inert gas tail shield over the molten and adjacent hot zones. Techniques such as spot welding, seam welding, and flash welding can be conducted without a protective atmosphere.
Special Considerations
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube should be shielded from hydrogen contamination due to improper pickling and from oxygen, nitrogen, and carbon absorption during forging, heat treating, brazing, etc. Such contamination may diminish ductility and adversely affect notch sensitivity and formability.
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