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

British Specs:，American Specs:，German Specs:

**Product Data Sheet: Alloy B-2 / Hastelloy® B-2** **Nickel-Molybdenum Alloy for Severe Corrosive Environments** --- ### **1. Product Overview** **Hastelloy® B-2** (UNS N10665) is a nickel-molybdenum alloy specifically designed to offer exceptional resistance to reducing environments, particularly hydrochloric acid at all concentrations and temperatures. This low-carbon, low-iron, and low-silicon version of the nickel-molybdenum alloy family provides improved thermal stability and minimizes the formation of detrimental phases, making it ideal for chemical processing equipment handling aggressive reducing media. --- ### **2. Chemical Composition (Typical % by Weight)** | Element | Content (%) | Function | |----------------|---------------|-------------------------------------------| | Nickel (Ni) | Balance | Base element providing corrosion resistance and 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 | | Electrical Resistivity | 1.35 μΩ·m 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 | --- ### **4. Product Applications** #### **4.1 Chemical Processing Industry** - **Hydrochloric Acid Production**: Reactors, distillation systems, and storage equipment - **Acetic Acid Equipment**: Reactors, columns, and heat exchangers - **Sulfuric Acid Service**: Handling concentrated sulfuric acid - **Phosphoric Acid Manufacturing**: Process equipment and piping #### **4.2 Pharmaceutical & Fine Chemicals** - **Reaction Vessels**: For organic synthesis and pharmaceutical production - **Heat Exchangers**: Handling corrosive process streams - **Piping Systems**: Transfer lines for aggressive chemicals - **Distillation Columns**: Components for acid purification #### **4.3 Pollution Control** - **Scrubber Systems**: For hydrochloric acid and other acid gas removal - **Waste Incineration**: Components handling acidic flue gases - **Chemical Recovery**: Equipment for acid recovery processes #### **4.4 Specialized Applications** - **Pickling Equipment**: For metal surface treatment - **Catalyst Support Systems**: In corrosive chemical processes - **Laboratory Equipment**: For handling highly corrosive reagents - **Nuclear Fuel Processing**: Selected components in reprocessing plants --- ### **5. Key Features & Benefits** - **Excellent Resistance to Reducing Environments**: Superior performance in hydrochloric acid at all concentrations and temperatures - **Outstanding Performance in Non-Oxidizing Acids**: Excellent resistance to sulfuric, phosphoric, and acetic acids - **Low Carbon Content**: Minimizes carbide precipitation during welding and thermal processing - **Good Thermal Stability**: Maintains properties at elevated temperatures - **Excellent Fabricability**: Can be welded, formed, and machined using standard techniques - **Minimized Secondary Phase Formation**: Reduced susceptibility to intermetallic phase formation - **Proven Reliability**: Long service life in demanding chemical environments --- ### **6. International Standards & Specifications** | Standard Type | Specification Number | Description | |---------------|----------------------|--------------------------------| | ASTM | B333 | Standard for Plate, Sheet, and Strip | | ASTM | B335 | Standard for Rod and Bar | | ASTM | B366 | Standard for Fittings | | ASTM | B622 | Standard for Seamless Pipe and Tube | | UNS | N10665 | Unified Numbering System Designation | | ASME | SB-333 | Code Case for Pressure Vessels | | DIN | 2.4617 | Material Number and Specification | | EN | 2.4617 | European Standard Designation | --- ### **7. Corrosion Resistance Performance** #### **7.1 Acid Resistance** - **Hydrochloric Acid**: Excellent at all concentrations and temperatures - **Sulfuric Acid**: Outstanding resistance to concentrated sulfuric acid - **Phosphoric Acid**: Excellent performance in all concentrations - **Acetic Acid**: Superior resistance in all concentrations - **Formic Acid**: Good resistance in most conditions #### **7.2 Special Conditions** - **Chloride Stress Corrosion Cracking**: Excellent resistance - **Pitting and Crevice Corrosion**: Good performance in most environments - **Oxidizing Conditions**: Limited resistance - not recommended --- ### **8. Fabrication & Processing Guidelines** #### **8.1 Welding** - **Welding Methods**: GTAW (TIG) preferred, GMAW (MIG) acceptable - **Filler Metals**: Use matching composition filler metals - **Preheating**: Generally not required - **Interpass Temperature**: Maintain below 100°C (212°F) - **Post-Weld Heat Treatment**: Usually not required #### **8.2 Heat Treatment** - **Solution Annealing**: 1065-1120°C (1950-2050°F) followed by rapid cooling - **Stress Relieving**: Generally not recommended - **Annealing Atmosphere**: Use bright annealing or protective atmosphere #### **8.3 Machining & Forming** - **Machining**: Use positive rake angles and rigid setups - **Cutting Tools**: Carbide tools recommended for optimal results - **Cold Working**: Good formability in annealed condition - **Hot Working**: Forge at 1175-1230°C (2150-2250°F) --- ### **9. Quality Assurance & Certification** - **Material Certification**: EN 10204 3.1/3.2 with full traceability - **Testing Protocols**: Mechanical testing, chemical analysis, corrosion testing - **Non-Destructive Testing**: UT, RT, PT, MT as required by specification - **Certifications**: ISO 9001, ASME, PED 2014/68/EU compliance - **Documentation**: Complete material traceability and test records --- **Disclaimer**: The technical information provided represents typical values and is for reference purposes. Actual properties may vary based on manufacturing process, product form, and heat treatment condition. Users must verify suitability for specific applications through appropriate testing and consult with technical experts for critical 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 2859 gallon liquid totes Special package is available on request.