Nickelvac C-276 UNS N10276 Nickel Superalloy, ASTM B 574, B 622, C276,E FORU

### **Product Introduction: Nickelvac® C-276 (UNS N10276) Nickel-Based Superalloy** **Nickelvac C-276 (UNS N10276)** is a versatile nickel-molybdenum-chromium superalloy renowned for its exceptional corrosion resistance in a wide range of severe environments. This solid-solution strengthened, low-carbon alloy exhibits outstanding performance in both oxidizing and reducing media, with superior resistance to pitting, crevice corrosion, and stress corrosion cracking. The carefully controlled low carbon and silicon content minimizes carbide precipitation during welding, making it suitable for as-welded applications in most corrosive environments. The alloy's balanced chemical composition provides optimal resistance to wet chlorine gas, hypochlorite, chlorine dioxide, and other aggressive chemicals, establishing it as one of the most reliable materials for demanding chemical processing, pollution control, and industrial applications. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Nickelvac C-276 per ASTM B574 is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | Balance | **Tungsten (W)** | 3.0 - 4.5 | | **Molybdenum (Mo)** | 15.0 - 17.0 | **Cobalt (Co)** | 2.5 max | | **Chromium (Cr)** | 14.5 - 16.5 | **Vanadium (V)** | 0.35 max | | **Iron (Fe)** | 4.0 - 7.0 | **Manganese (Mn)** | 1.0 max | | **Carbon (C)** | 0.01 max | **Silicon (Si)** | 0.08 max | | **Phosphorus (P)** | 0.04 max | **Sulfur (S)** | 0.03 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.89 g/cm³ | 0.321 lb/in³ | | **Melting Range** | 1325 - 1370 °C | 2417 - 2498 °F | | **Thermal Conductivity** | 10.2 W/m·K | 70.7 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 11.3 μm/m·°C | 6.3 μin/in·°F | | **Modulus of Elasticity** | 205 GPa | 29.7 x 10⁶ psi | | **Specific Heat** | 427 J/kg·K | 0.102 Btu/lb·°F | **Mechanical Properties (Annealed Condition):** | Property | Value | |----------|-----------------| | **Tensile Strength** | 690 MPa | 100 ksi | | **Yield Strength (0.2% Offset)** | 283 MPa | 41 ksi | | **Elongation** | 40% | | **Hardness (Rockwell B)** | 90 HRB | **Elevated Temperature Properties (at 538°C/1000°F):** | **Tensile Strength** | 550 MPa | 80 ksi | | **Yield Strength** | 240 MPa | 35 ksi | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Exceptional Corrosion Resistance**: Outstanding performance in both oxidizing and reducing environments - **Superior Localized Corrosion Resistance**: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking - **Broad Chemical Compatibility**: Effective in sulfuric acid, hydrochloric acid, phosphoric acid, and chlorine environments - **Excellent Thermal Stability**: Maintains mechanical properties at elevated temperatures - **Superior Weldability**: Can be welded without post-weld heat treatment for most applications - **Versatile Performance**: Suitable for a wide range of temperatures from cryogenic to elevated temperatures **Product Applications:** Nickelvac C-276 serves critical functions across multiple industries: - **Chemical Processing Industry**: - Reactors and pressure vessels for aggressive chemical production - Heat exchangers and condensers in corrosive service - Piping systems handling mixed acids and chlorides - Distillation columns and absorption towers - **Pollution Control Systems**: - Flue gas desulfurization (FGD) system components - Scrubbers and gas cleaning equipment - Waste incineration systems - Chemical waste treatment equipment - **Pharmaceutical Industry**: - Reactor vessels for active pharmaceutical ingredient production - High-purity fluid handling systems - Process equipment requiring cleanability and corrosion resistance - **Pulp and Paper Industry**: - Digester components - Bleach plant equipment - Chemical recovery systems - **Industrial and Marine Applications**: - Seawater handling components - Offshore oil and gas equipment - Industrial heating systems --- #### **4. International Standards & Specifications** Nickelvac C-276 is comprehensively covered by international standards: **ASTM Standards:** - **ASTM B574**: Low-Carbon Nickel-Molybdenum-Chromium Alloy Rod - **ASTM B622**: Seamless Pipe and Tube - **ASTM B575**: Plate, Sheet, and Strip **Other International Standards:** - **UNS**: N10276 - **ASME**: SB-574, SB-622, SB-575 - **EN**: 2.4819 (NiMo16Cr15W) - **DIN**: 2.4819 - **ISO**: 15156-3 / NACE MR0175 compliant - **JIS**: NW 0276 --- #### **Summary of Key Advantages** - **Versatile Corrosion Resistance**: Excellent performance across a broad spectrum of corrosive media - **Superior Localized Corrosion Resistance**: Outstanding resistance to pitting and crevice corrosion - **Optimized Chemical Composition**: Low carbon content minimizes sensitization during welding - **Excellent Weldability**: Can be welded without post-weld heat treatment for most applications - **Comprehensive Standardization**: Covered by complete suite of international specifications - **Proven Reliability**: Extensive successful service history in severe corrosive environments **Technical Note**: Nickelvac C-276 exhibits excellent weldability using GTAW, GMAW, and SMAW processes with matching filler metals. The alloy's low carbon content minimizes sensitization during welding, making it suitable for as-welded construction in most applications. The material demonstrates good cold and hot working characteristics, with intermediate annealing recommended for severe cold forming operations. Proper cleaning after fabrication is essential to maintain optimum corrosion resistance performance. The alloy maintains good mechanical properties at cryogenic temperatures while offering excellent resistance to chloride-induced stress corrosion cracking.

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 3160 gallon liquid totes Special package is available on request.