Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless titanium tubes and welded titanium tubes, which boast outstanding ductility and cold formability, making them perfect for deep drawing applications. Grade 1 titanium tubes are celebrated for their superb general and seawater corrosion resistance, as well as exceptional resistance to oxidizing, neutral, and slightly reducing media (solutions), including chlorides.
Titanium's low density (approximately half that of nickel-based alloys), high strength, lightweight nature, and corrosion resistance make it an excellent choice for a variety of challenging chemical environments. The execution standards are: 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)
This is the most commonly used titanium tube for industrial applications, offering an excellent balance of moderate strength and reasonable ductility. It provides exceptional corrosion resistance in both highly oxidizing and slightly reducing conditions, including chlorides. It delivers robust corrosion protection in the chemical and offshore industries, as well as aircraft manufacturing, where strength and ease of forming are paramount. It's also employed in heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, CPI equipment, and pipes.
Fabrication
Titanium Grade 2 responds excellently to cold forming using standard methods. It can be readily machined, but special care must be taken 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 in a wide range of sizes.
Weight Reduction
CP 2 grade titanium tubes feature low density and a high strength-to-weight ratio, making them ideal for applications requiring weight reduction without compromising overall strength. They are cold formable, exhibit good ductility, and can be welded using conventional TIG and MIG processes. However, inert gas shielding is essential to prevent embrittlement of the weld zone.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube exhibits an alpha (hexagonal close-packed) crystal structure, similar to commercially pure titanium grades 1 and 3. Around 885°C [1625°F], it transforms into a beta (body-centered cubic) structure. This transformation temperature can vary depending on the type and amount of impurities or alloying additions. The addition of alloying elements also splits the single temperature of the equilibrium transformation into two temperature zones: the alpha transformation zone, below which the alloy is entirely alpha, and the beta transformation zone, above which the alloy is completely beta. Between these two temperatures, 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 are manufactured from hollow blanks through a hot extrusion process or oblique rolling and piercing process, followed by multiple cold rolling stages. Titanium seamless tubes should maintain continuous perimeters throughout all manufacturing stages. The comprehensive manufacturing of titanium seamless tubes involves: sponge titanium vacuum arc melting, ingot blanking to obtain 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 strip using the advanced automatic arc welding (TIG) process. The comprehensive production processes 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 at least one stress relief heat treatment post-formation and welding. Notably, Daxun does not employ any filler materials during the welding process, ensuring the highest purity and integrity of the pipe.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium TubeTitanium 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 titanium alloy employs aluminum as the alpha stabilizer and vanadium as the beta stabilizer. Renowned for its high strength, this alloy is operational at low temperatures around 800°F (427°C). The ATI Ti-6Al-4V, Grade 5 alloy is optimal for annealing, solution treating, and aging. Its applications span across 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.
Initially, the alloy is meticulously melted using either vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM) techniques. The remelting process is executed in one or two vacuum arc steps to ensure utmost purity and consistency.
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) when high hardness, tensile strength, and fatigue strength are essential.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options tailored to specific requirements.
1. Annealing: 1,275 - 1,400°F (691 - 760°C), ½ to 2 hours, air or furnace cooling.
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C), 1 to 8 hours, air or furnace cooling.
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C), 1 hour, water quench.
4. Aging: 975 - 1,025°F (524 - 552°C), 4 to 8 hours - air cooling.
Optimum Properties Optimal properties are attained in small cross sections with rapid quenching in the solution treated and aged condition. Larger cross-section sizes or delayed quenching may yield less than optimal properties.
HardnessIn the annealed condition, the typical hardness ranges from Rockwell C 30-34, whereas in the solution treated and aged condition, it ranges approximately from Rockwell C 35-39.
Forgeability/Formability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube undergoes forging at a precise temperature of 1,750°F (954°C), culminating in a final forging temperature of 1,450°F (788°C). For optimal performance, a reduction of at least 35% is recommended.
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube presents challenges in forming at room temperature, even after annealing. Therefore, extensive forming operations like bending or stretching are best achieved on the annealed material at elevated temperatures up to 1,200°F (649°C), ensuring no alteration in its mechanical properties. Creep forming is an excellent method for hot sizing or forming within the 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 effectively machined utilizing techniques akin to those for austenitic stainless steels. Employ slow speeds, high feeds, robust tool rigidity, and ample amounts of non-chlorinated cutting fluids for superior results.
Weldability DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is easily weldable in both the annealed or solution and partially aged conditions, with the aging process
completed during post-weld heat treatment. It is crucial to prevent contamination with oxygen, nitrogen, and hydrogen. Fusion welding should be performed in an inert gas-filled chamber or with an inert gas tail shield over the molten metal and adjacent hot zones. Spot welding, seam welding, and flash welding can be executed without a protective atmosphere.
Special Considerations DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube is susceptible to contamination by hydrogen from improper pickling and by the absorption of oxygen, nitrogen, and carbon during processes such as forging, heat treating, and brazing. Such contamination can diminish ductility and adversely affect notch sensitivity and formability.
