Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
We offer seamless and welded titanium tubes, renowned for their exceptional ductility and cold formability, making them perfect for deep drawing applications. Our Grade 1 titanium tubes boast excellent general and seawater corrosion resistance. They also exhibit outstanding resistance to oxidizing, neutral, and slightly reducing media, including chlorides.
Titanium's remarkable attributes-low density (approximately half that of nickel-based alloys), high strength, lightweight, and superior corrosion resistance-make it the ideal choice for demanding chemical conditions. Our products adhere to the following execution 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 as the most utilized titanium tube for industrial purposes, Grade 2 offers an exceptional balance of moderate strength and commendable ductility. It ensures superb corrosion resistance under highly oxidizing and slightly reducing conditions, including those with chlorides. This grade is indispensable in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, industrial and aerospace components, and CPI equipment.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. It is easily machinable, requiring sharp tools and copious coolant to maintain effectiveness. Similar to machining austenitic stainless steels, cuts should be deep and continuous, with reduced 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
With their low density and high strength-to-weight ratio, CP 2 grade titanium tubes are ideal for applications demanding weight reduction without compromising strength. They are cold formable, exhibit good ductility, and can be welded using standard TIG and MIG processes, provided inert gas shielding is used to prevent weld zone embrittlement.
Crystal Structure
At room temperature, ASTM B338 Grade 2 titanium tube features an alpha (hexagonal close-packed) crystal structure, akin to commercially pure grades 1 and 3. Upon reaching approximately 885°C (1625°F), it transitions to a beta (body-centered cubic) structure. The transformation temperature can vary with impurities or alloying additions. The introduction of alloying elements divides the equilibrium transformation temperature into two distinct zones: the alpha transformation zone (all alpha below) and the beta transformation zone (all beta above). Between these zones, 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
At Daxun, our ASTM B338 Grade 2 titanium seamless tubes are crafted using hollow blanks through hot extrusion or oblique rolling and piercing processes, followed by multiple cold rolling operations. Each manufacturing stage ensures seamless continuity. The comprehensive process includes: vacuum arc melting of sponge titanium, ingot blanking to obtain hollow blanks, cleaning, cutting, feeding, hot extrusion or oblique rolling and piercing, degreasing, drying, cutting, online annealing, 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 crafted from annealed flat-rolled steel plate or steel strip using the advanced automatic arc welding (TIG) process. Key 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 at least one stress relief heat treatment post-forming and welding. Notably, Daxun employs filler materials during the welding process to ensure top-notch quality and durability.
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 renowned titanium alloy. This duplex alpha+beta titanium alloy utilizes aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This robust alloy is suitable for applications at low temperatures around 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging processes. It finds extensive use in 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 state-of-the-art techniques such as vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Subsequent remelting involves one or two vacuum arc steps, ensuring supreme purity and quality.
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: 1,830°F (± 25°); 999°C (± 14°)
Heat Treatment Annealed at 1,700-1,900°F (927 - 1,038°C), this process achieves high hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to meet diverse requirements.
1. Annealing: Conducted at 1,275 - 1,400°F; (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling.
2. Stress Relief Annealing: Performed at 1,000 - 1,200°F; (538 - 649°C) for 1 to 8 hours, with air or furnace cooling.
3. Solution Heat Treating: Carried out at 1,675 - 1,750°F; (913 - 954°C) for 1 hour, followed by water quenching.
4. Aging: Executed at 975 - 1,025°F; (524 - 552°C) for 4 to 8 hours, culminating in air cooling.
Optimum Properties Achieving optimal properties is possible with small cross-sections and rapid quenching in the solution-treated and aged condition. However, larger cross-section sizes or delayed quenching can result in less-than-ideal properties.
HardnessTypical hardness values range from Rockwell C 30-34 in the annealed condition to approximately Rockwell C 35-39 in the solution-treated and aged condition.
Forgeability/Formability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, is a marvel of modern engineering. Expertly forged at a searing 1,750°F (954°C) with a concluding forging temperature of 1,450°F (788°C), this titanium tube achieves optimal performance with a recommended reduction of at least 35%.
Forming DAXUN Ti-6Al-4V Titanium Tube, Grade 5, at room temperature is a challenge, even when annealed. For complex operations like bending or stretching, the material can be formed at up to 1,200°F (649°C) while retaining its mechanical integrity. For precise shaping or hot sizing, temperatures between 1,000 to 1,200°F (538 to 649°C) are ideal for creep forming.
Machinability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, can be machined using techniques designed for austenitic stainless steels. This includes operating at slow speeds, maintaining high feed rates, ensuring robust tool rigidity, and utilizing copious amounts of non-chlorinated cutting fluids to achieve precision machining.
Weldability The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, demonstrates excellent weldability in both annealed and solution-treated conditions. It retains its superior properties after aging during post-weld heat treatment.
During welding, it is crucial to avoid contamination from oxygen, nitrogen, and hydrogen. Fusion welding is best performed in an inert gas-filled chamber, or by utilizing an inert gas tail shield over the molten metal and adjacent hot areas. Additionally, spot welding, seam welding, and flash welding can be executed without the need for a protective atmosphere.
Special Considerations The DAXUN Ti-6Al-4V Titanium Tube, Grade 5, requires meticulous handling to prevent contamination. Improper pickling and the absorption of oxygen, nitrogen, and carbon during processes such as forging, heat treating, and brazing can introduce hydrogen, which diminishes ductility and negatively affects notch sensitivity and formability.