Hastelloy Hybrid-BC1 Nickel Alloy,HYBRID-BC1 alloy，1

### **Introduction to Hastelloy® Hybrid-BC1 (UNS N10362) Nickel Alloy** **Hastelloy® Hybrid-BC1** is a modern, versatile nickel-chromium-molybdenum alloy engineered to bridge the performance gap between established alloys like C-276 (N10276) and C-22 (N06022). It is designed to offer an optimized combination of exceptional corrosion resistance, high-temperature stability, excellent mechanical properties, and good fabricability. The "Hybrid" name reflects its balanced chemistry, which provides resistance to both oxidizing and reducing corrosive media. It is particularly effective in environments containing sulfuric acid, phosphoric acid, and other aggressive chemicals where chlorides and oxidizing salts are present. --- ### **Chemical Composition (Weight %, typical)** The composition of Hybrid-BC1 is carefully balanced to provide its unique properties. | Element | Minimum | Maximum | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | **Balance** | | Forms the stable, corrosion-resistant matrix. | | **Chromium (Cr)** | 21.0 | 23.5 | Provides resistance to oxidizing media and localized corrosion. | | **Molybdenum (Mo)** | 18.0 | 20.0 | Provides resistance to reducing media and pitting/crevice corrosion. | | **Tungsten (W)** | 1.5 | 2.5 | Enhances pitting resistance and solid solution strengthening. | | **Iron (Fe)** | - | 3.0 | Incidental element; kept low for corrosion performance. | | **Cobalt (Co)** | - | 2.0 | Incidental element. | | **Manganese (Mn)** | - | 0.50 | Controls sulfur content and improves hot workability. | | **Silicon (Si)** | - | 0.08 | Kept very low to prevent segregation and maintain corrosion resistance. | | **Vanadium (V)** | - | 0.30 | - | | **Carbon (C)** | - | 0.01 | Kept extremely low to minimize carbide precipitation. | | **Phosphorus (P)** | - | 0.02 | Kept low to prevent segregation. | | **Sulfur (S)** | - | 0.01 | Kept extremely low to improve hot workability and ductility. | *The low levels of carbon and silicon are critical for its superior thermal stability and corrosion resistance in the as-welded condition.* --- ### **Physical Properties (Typical)** * **Density:** 8.89 g/cm³ (0.321 lb/in³) * **Melting Range:** 1325 - 1370 °C (2415 - 2500 °F) * **Electrical Resistivity:** 128 μΩ·cm at 21°C * **Thermal Expansion Coefficient:** 12.0 μm/m·°C (20-100°C) * **Thermal Conductivity:** 10.1 W/m·K at 100°C * **Modulus of Elasticity (Young's Modulus):** 207 GPa (30 x 10⁶ psi) at 21°C --- ### **Mechanical Properties (Typical at Room Temperature, Annealed Condition)** * **Tensile Strength:** ≥ 758 MPa (110 ksi) * **Yield Strength (0.2% Offset):** ≥ 352 MPa (51 ksi) * **Elongation:** ≥ 55% *Its high elongation indicates excellent ductility and formability.* --- ### **Key Characteristics and Product Applications** #### **Key Characteristics:** 1. **Versatile Corrosion Resistance:** Excellent performance in a wide range of acids, including sulfuric, phosphoric, and hydrochloric, and resistance to pitting and crevice corrosion in chloride-containing solutions. 2. **Excellent Thermal Stability:** The low silicon and carbon content significantly reduce the tendency for microstructural degradation (formation of detrimental secondary phases) during exposure to high temperatures, such as in welding or high-temperature service. This makes it highly suitable for the **as-welded condition** without requiring post-weld heat treatment. 3. **Good Fabricability:** It can be formed and welded using standard techniques commonly employed for nickel alloys. 4. **Oxidizing/Reducing Balance:** Its chromium and molybdenum content is optimized to handle both oxidizing and reducing environments effectively. #### **Primary Applications:** Hybrid-BC1 is used in some of the most demanding industrial environments: * **Chemical Processing Industry (CPI):** * Reactors, columns, and heat exchangers handling sulfuric and phosphoric acids. * Acid recovery systems and evaporators. * Piping systems for aggressive chemical streams. * **Flue Gas Desulfurization (FGD) Systems:** * Scrubbers, outlet ducts, and stack liners where acidic chlorides and fluorides are present. * **Pharmaceutical Industry:** * Process equipment requiring high purity and resistance to cleaning agents and process chemicals. * **Pulp and Paper Industry:** * Digester and bleaching system components. * **Industrial and Hazardous Waste Incineration:** * Components exposed to aggressive combustion by-products. --- ### **International Standards** As a relatively newer alloy, its standardization is ongoing. However, it is recognized under a Unified Numbering System (UNS) designation and is increasingly included in material specifications. | Product Form | Standard | Designation | Notes | | :--- | :--- | :--- | :--- | | **Plate, Sheet, Strip** | ASTM B575 | UNS N10362 | Standard Specification for Low-Carbon Nickel-Chromium-Molybdenum, Nickel-Chromium-Molybdenum-Copper, and Nickel-Chromium-Molybdenum-Tungsten Alloy Plate, Sheet, and Strip. | | **Pipe & Tube** | ASTM B622 / B619 / B626 | UNS N10362 | Seamless and welded pipe and tube specifications. | | **Bar & Wire** | *Under Development* | - | Typically supplied to customer-specific requirements based on ASTM B574 composition. | | **Welding Consumables** | AWS A5.14 | **ERNiCrMo-19** (proposed) | Matching composition filler metal for GTAW, GMAW, etc. | | **Welding Consumables** | AWS A5.11 | **ENiCrMo-19** (proposed) | Matching composition covered electrodes for SMAW. | **Note:** "Hastelloy" and "Hybrid-BC1" are registered trademarks of **Haynes International, Inc.**, the developer and primary producer of this alloy. For critical applications, it is always recommended to consult the latest data sheets from the manufacturer.

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 3257 gallon liquid totes Special package is available on request.