Alloy B-2,Hastelloy B-2 Tube,,E FORU

British Specs:，American Specs:，German Specs:

**Product Data Sheet: Alloy B-2 / Hastelloy® B-2 Tube** **Nickel-Molybdenum Alloy Tube for Severe Corrosive Service** --- ### **1. Product Overview** **Hastelloy® B-2 Tube** is a nickel-molybdenum alloy tubing product specifically engineered for handling highly aggressive reducing environments in various industrial applications. Available in both seamless and welded configurations, these tubes offer exceptional resistance to hydrochloric acid, sulfuric acid, and other reducing media across all concentrations and temperatures. The optimized chemical composition with low carbon, iron, and silicon content ensures superior performance in the most demanding chemical processing applications. --- ### **2. Chemical Composition (Typical % by Weight)** | Element | Content (%) | Function | |---------|-------------|----------| | Nickel (Ni) | Balance | Base element providing corrosion resistance and metallurgical stability | | Molybdenum (Mo) | 26.0-30.0 | Primary element for resistance to reducing acids | | Iron (Fe) | 2.0 max | Controlled to minimize detrimental phase formation | | Chromium (Cr) | 1.0 max | Limited to maintain performance in reducing environments | | Manganese (Mn) | 1.0 max | Deoxidizer and process control | | Silicon (Si) | 0.10 max | Controlled to prevent silicide formation | | Carbon (C) | 0.02 max | Minimized to prevent carbide precipitation | | Cobalt (Co) | 1.0 max | Controlled impurity | | Phosphorus (P) | 0.04 max | Controlled to prevent embrittlement | | Sulfur (S) | 0.03 max | Minimized to prevent hot cracking | --- ### **3. Physical & Mechanical Properties** | Property | Value (Typical) | |----------|-----------------| | Density | 9.22 g/cm³ | | Melting Point | 1330-1380°C (2426-2516°F) | | Thermal Conductivity | 10.8 W/m·K at 20°C | | Coefficient of Thermal Expansion | 10.3 μm/m·K (20-100°C) | | Specific Heat Capacity | 427 J/kg·K at 20°C | | Modulus of Elasticity | 217 GPa at 20°C | | Tensile Strength | 965 MPa min | | Yield Strength (0.2% Offset) | 415 MPa min | | Elongation | 40% min | | Hardness (Rockwell B) | 100 HRB max | | Maximum Service Temperature | 400°C (750°F) | --- ### **4. Product Applications** #### **4.1 Heat Exchanger Applications** - **Shell and Tube Heat Exchangers**: Tubes for corrosive service on both shell and tube sides - **Condensers**: Handling corrosive vapors and cooling media - **Evaporators**: Heating tubes in acid concentration systems - **Coolers**: Process coolers handling aggressive chemical streams #### **4.2 Chemical Processing Industry** - **Reactor Coils**: Heating and cooling coils in chemical reactors - **Transfer Lines**: Corrosive fluid transfer and sampling lines - **Analytical Instrumentation**: Tubing for corrosive process analytical systems - **Chemical Injection Lines**: Metering and injection tubing for aggressive chemicals #### **4.3 Pharmaceutical & Fine Chemicals** - **Process Tubing**: Handling intermediates and final products - **Utility Lines**: Heat transfer fluid and service lines - **Clean-in-Place Systems**: Tubing for aggressive cleaning solutions - **Bioreactor Systems**: Heating/cooling coils and transfer lines #### **4.4 Specialized Applications** - **Pickling Equipment**: Heating coils and process tubing - **Acid Recovery Systems**: Evaporator and concentrator tubes - **Laboratory Equipment**: High-purity chemical handling systems - **Pollution Control**: Scrubber system components --- ### **5. Key Features & Benefits** - **Exceptional Resistance to Reducing Acids**: Superior performance in hydrochloric acid at all concentrations and temperatures - **Excellent Thermal Stability**: Maintains corrosion resistance at elevated temperatures - **Low Carbon Content**: Minimizes carbide precipitation during welding and service - **Good Fabricability**: Can be bent, expanded, and welded using standard techniques - **Optimized Wall Thickness**: Consistent wall distribution for maximum heat transfer efficiency - **Smooth Internal Surface**: Minimizes fouling and pressure drop - **Cost-Effective Solution**: Extended service life reduces maintenance and replacement costs - **Full Traceability**: Complete material certification and quality documentation --- ### **6. International Standards & Specifications** | Standard Type | Specification Number | Description | |---------------|----------------------|-------------| | ASTM | B622 | Standard Specification for Seamless Nickel and Nickel Alloy Pipe and Tube | | ASTM | B626 | Standard for Welded Nickel and Nickel Alloy Tube | | ASTM | B775 | General Requirements for Nickel Alloy Tube | | UNS | N10665 | Unified Numbering System Designation | | ASME | SB-622 | Code Case for Pressure Vessel Applications | | DIN | 2.4617 | Material Number and Specification | | EN | 2.4617 | European Standard Designation | --- ### **7. Product Specifications** #### **7.1 Tube Types & Sizes** - **Seamless Tube**: OD 3mm to 150mm, Wall thickness 0.5mm to 12mm - **Welded Tube**: OD 6mm to 300mm, Wall thickness 0.8mm to 8mm - **Heat Exchanger Tubes**: To ASTM/ASME specifications for tube sheets - **Instrumentation Tubes**: Small diameter tubes for precision applications #### **7.2 Technical Specifications** - **OD Tolerance**: ±0.1mm to ±0.5% depending on diameter - **Wall Thickness Tolerance**: ±10% for seamless, ±7.5% for welded - **Straightness**: ≤1.0mm per meter for precision applications - **Surface Finish**: Pickled, bright annealed, or special finishes available --- ### **8. Fabrication & Installation Guidelines** #### **8.1 Tube Installation** - **Tube Expansion**: Proper rolling techniques to avoid over-thinning - **Bending**: Cold bending for radii >3×OD; mandrel bending for tight radii - **Cutting**: Band saw or abrasive cutting with proper deburring - **Cleaning**: Chemical cleaning to remove manufacturing residues #### **8.2 Welding & Joining** - **Welding Methods**: GTAW (TIG) preferred for tube-to-tubesheet welding - **Filler Metals**: Use matching composition filler metals - **Tube-to-Tubesheet Welding**: Strength welding or light expansion with seal welding - **Purge Gas**: Maintain proper internal purge during welding operations #### **8.3 Quality Control** - **Leak Testing**: Pneumatic or hydrostatic testing as required - **Dimensional Verification**: OD, wall thickness, and straightness checks - **Surface Inspection**: Visual and dye penetrant examination - **Documentation**: Certified Mill Test Reports with full traceability --- ### **9. Quality Assurance & Certification** - **Material Certification**: EN 10204 3.1/3.2 with full traceability - **Non-Destructive Testing**: Eddy current, ultrasonic, hydrostatic testing - **Chemical Analysis**: Verified by spectrometer and wet chemical methods - **Mechanical Testing**: Tensile, hardness, and flattening tests - **Certifications**: ISO 9001, PED 2014/68/EU, NORSOK compliance - **Documentation**: Complete certification package including heat treatment records --- **Disclaimer**: The technical information provided represents typical values and is for reference purposes. Actual properties may vary based on manufacturing process, tube size, and heat treatment condition. Users must verify suitability for specific applications through appropriate testing and consult with technical experts for pressure-containing applications. Hastelloy® is a registered trademark of Haynes International. Compliance with all applicable safety standards, codes, and regulations is mandatory.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2863 gallon liquid totes Special package is available on request.