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ASTM B861 GR.2 UNS R50400 Titanium Unalloyed Pipe For High Corrosion Resistance

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ASTM B861 GR.2 UNS R50400 Titanium Unalloyed Pipe For High Corrosion Resistance

Brand Name : YUHONG

Model Number : ASTM B861 GR.2 UNS R50400

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : China

MOQ : 100 KGS

Price : Negotiable

Payment Terms : L/C,T/T

Supply Ability : Accdording to customer's request

Delivery Time : 35-40 days

Packaging Details : Ply-wooden Case /Iron Case/ Bundle with plastic Cap

Product Name : Titanium Unalloyed Pipe

Specification : ASTM B861/ASME SB861

Material : GR.2 / UNS R50400

Type : Seamless

End : Plain Ends / Beveled Ends

Surface : Polished, Pickling, Sandblasting

Application : Heat Exchanger, Marine Engineering, Boiler

Test : Eddy Current Test, Hydro Test, Flattening Test; Expansion Test, Mercurous Nitrate Test; Ammonia Vapor Test; Chemical Analysis; Microscopical Examination; Tension Testing

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ASTM B861 GR.2 UNS R50400 Titanium Unalloyed Pipe For High Corrosion Resistance

ASTM B861 GR.2 UNS R50400 Titanium Unalloyed Pipe manufactured from commercially pure, unalloyed Titanium Grade 2. This material identified by the Unified Numbering System (UNS) designation R50400, is characterized by its excellent balance of moderate strength, superior ductility, and outstanding formability. Its primary value lies in its exceptional resistance to corrosion across a wide range of environments, particularly in chloride-containing media such as seawater, brines, and oxidizing acids, where stainless steels would typically fail. These seamless pipes are produced without a longitudinal weld, ensuring enhanced structural integrity, uniform mechanical properties, and superior reliability for high-pressure and critical applications in aggressive service conditions. They are a cornerstone material in industries like chemical processing, offshore oil and gas, marine engineering, and power generation condensers.


1.Chemical & Mechanical Properties

ASTM B861 GR.2 Chemical Composition (%)
Ti C Fe H O N

BAL

 ≤0.08% ≤0.30% 0.015% ≤0.25% ≤0.03%


Mechanical Properties

Tensile Strength Yield Strength Elongation Hardness
≥ 345 MPa (50 ksi) 275-450 MPa (40-65ksi) 20% (in 2 inch) ≤80 HRB

Physical properties

Density Melting point coefficient of thermal expansion thermal conductivity
4.51 g/cm³ (0.163 lb/in³)

~1660°C (~3020°F)

 8.6 x 10⁻⁶ /°C (20-100°C) 17 W/m·K


2. Key Adventages

  • Exceptional Corrosion Resistance: Outstanding resistance to a wide range of corrosive environments, including chlorides (seawater, brine), oxidizing acids, and organic chemicals. Highly resistant to pitting, crevice corrosion, and stress corrosion cracking.

  • High Strength-to-Weight Ratio: Provides strength comparable to some steels at nearly half the weight, leading to more efficient and lightweight system designs.

  • Seamless Integrity: Manufactured without a longitudinal weld, eliminating a potential failure point and ensuring uniform microstructure and mechanical properties throughout the pipe's circumference, ideal for high-pressure applications.

  • Excellent Fabricability: Possesses good ductility and formability, allowing for easier bending, flaring, and welding compared to higher-strength titanium alloys.

  • Biocompatibility: Grade 2 titanium is biocompatible, making it suitable for pharmaceutical, food processing, and bio-medical applications.

3. Key Applications

  • Chemical Processing: Heat exchangers, reactors, process piping handling chlorides, nitric acid, and other aggressive chemicals.

  • Oil & Gas: Offshore platform piping, risers, heat exchanger tubes in seawater cooling systems.

  • Power Generation: Condenser and heat exchanger tubes in coastal and nuclear power plants.

  • Marine & Offshore: Seawater piping systems, ballast systems, firewater lines.

  • Aerospace: Hydraulic lines and tubing for non-structural components.

  • Pharmaceutical & Food: Process equipment where product purity and corrosion resistance are paramount.

  • Pulp & Paper: Bleach plants and equipment handling corrosive liquors.


Category Gr.7 (Ti-0.2Pd) Gr.1 Gr.2 Gr.5 (Ti-6Al-4V) Gr.9 (Ti-3Al-2.5V)
UNS Number R52400 R50250 R50400 R56400 R56320
Main Composition Ti-0.2Pd Alloy Pure Ti (Low O) Pure Ti (Standard) Ti-6Al-4V Alloy Ti-3Al-2.5V Alloy
Tensile Strength (MPa) 345-483 240-310 345-483 895-1034 483-620
Yield Strength (MPa) 275-380 170-240 275-380 828-897 345-550
Elongation (%) ≥20 ≥24 ≥20 ≥10 ≥15
Corrosion Resistance Best for HCl/H₂SO₄ Good for seawater/weak acids General corrosion resistance Resists chlorides (weak welds) Good seawater resistance
Typical Applications Strong acids, nuclear plants Chemical linings Desalination, heat exchangers Aerospace, pressure vessels Ship piping



ASTM B861 GR.2 UNS R50400 Titanium Unalloyed Pipe For High Corrosion Resistance


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