Seamless Hastelloy B2 Tube
Thanks to their excellent corrosion resistance, high mechanical strength, and thermal stability, Hastelloy B2 seamless tubes perform reliably under high temperature and high-pressure operating conditions.
GZH, a professional nickel alloy tube manufacturer and supplier based in Wenzhou, China, specializes in producing precision seamless Hastelloy B2 tubes in compliance with international standards such as ASTM B622 / ASME SB622. Our products are manufactured using advanced production technology and strict quality control procedures.
Each tube undergoes comprehensive inspection and testing, including:
Chemical composition analysis
Mechanical property testing
Non-destructive testing (NDT)
Hydrostatic or eddy current testing
Full material traceability documentation
All tubes are carefully packaged and fully prepared for global export, ensuring consistent quality, reliable performance, and long service life in demanding industrial environments.
High-Performance Seamless Hastelloy B2 Tubes (UNS N10665) | Corrosion-Resistant Solutions
Seamless Hastelloy B2 Tubes are high-integrity piping components engineered from a premium nickel-molybdenum superalloy. Unlike welded alternatives, these tubes are manufactured from a single solid billet, ensuring a continuous metallurgical structure that eliminates the risk of weld-related failure in high-stress and extremely corrosive environments.
As a specialized reducing-environment alloy, Hastelloy B2 is renowned for its exceptional resistance to hydrochloric acid (HCl) across all concentrations and temperatures. It also provides robust protection against sulfuric and phosphoric acids, making it a critical material for aggressive chemical processing.
Key Technical Features and Engineering Advantages
Exceptional Resistance to Reducing Media: Optimized nickel-molybdenum chemistry provides unrivaled stability in hydrochloric, sulfuric, and phosphoric acid environments.
Superior Resistance to SCC: The high nickel content ensures immunity to Chloride-Ion Stress-Corrosion Cracking (SCC), even at elevated temperatures.
High Pressure & Thermal Stability: The seamless extrusion process guarantees uniform wall thickness, allowing the tube to handle high internal pressures and thermal cycling without compromising safety.
Minimized Carbide Precipitation: The low-carbon chemistry prevents carbide precipitation in the Heat-Affected Zone (HAZ), maintaining the material's corrosion resistance during fabrication.
Enhanced Fabricability: Despite its high alloy content, B2 exhibits excellent workability and can be formed or joined using standard industrial methods.
Advanced Manufacturing & Quality Assurance
The production of Hastelloy B2 seamless tubes requires precise metallurgical control through a multi-stage process:
Hot Extrusion: A solid billet is heated and forced through a die above its recrystallization temperature, creating a high-strength hollow shell with a refined grain structure.
Precision Cold Finishing: The shell is meticulously rolled and cold-drawn to achieve tight dimensional tolerances for Outside Diameter (OD) and Wall Thickness (WT).
Solution Annealing: The tubes undergo a specialized heat treatment to relieve internal stresses and achieve optimal corrosion-resistant properties.
Rigorous Integrity Testing: Every tube is subjected to 100% Non-Destructive Testing (NDT), including hydrostatic and eddy current verification, ensuring total reliability for demanding applications.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Hastelloy B2.
Table 1: Chemical Composition of Hastelloy B2
The composition of Hastelloy B2 is carefully balanced to achieve its superior corrosion resistance and high strength.
| Grade | Ni | Cr | Mo | Fe | C | Si | Co | Mn | P | S |
| UNS N10665 | Balance | ≤1.00 | 26.00-30.00 | ≤2.00 | ≤0.02 | ≤0.10 | ≤1.00 | ≤1.00 | 0.04 | 0.03 |
Table 2: Typical Mechanical Properties of Hastelloy B2
Hastelloy B2 is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
Tensile Strength | Yield Strength | Elongation | Hardness |
≥ 760 MPa | ≥ 350 MPa | ≥ 40% | ≤ 100 HRB |
Strategic Industrial Applications
The combination of high mechanical strength and extreme chemical resistance makes Seamless B2 tubes the preferred choice for:
Chemical & Petrochemical Processing: Reactors, heat exchangers, and piping systems handling aggressive reducing acids.
Pharmaceutical Production: Critical equipment involving highly reactive reducing agents and high-purity requirements.
Waste Management: Handling systems for hazardous, corrosive waste streams and acidic by-products.
Specialized Acid Production: Essential for acetic acid (vinegar) production and other organic acid processing plants.
