INCONEL C276 Nickel Superalloy,C-276，1

### **Product Introduction: INCONEL® C-276 (UNS N10276)** **INCONEL® C-276** is a nickel-chromium-molybdenum superalloy renowned for its exceptional corrosion resistance in a wide range of severe environments. As one of the most versatile corrosion-resistant alloys available, it exhibits outstanding performance in both oxidizing and reducing media, with particular resistance to pitting, crevice corrosion, and stress corrosion cracking. The alloy's low carbon and silicon content minimizes carbide precipitation in the heat-affected zone during welding, making it suitable for most chemical process applications in the as-welded condition. This feature, combined with its excellent fabrication characteristics, has established C-276 as an industry standard for handling the most aggressive corrosive environments. --- ### **Chemical Composition** The chemical composition is precisely balanced for maximum corrosion resistance: | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 14.5 - 16.5 | | **Molybdenum (Mo)** | 15.0 - 17.0 | | **Tungsten (W)** | 3.0 - 4.5 | | **Iron (Fe)** | 4.0 - 7.0 | | **Cobalt (Co)** | 2.5 max | | **Vanadium (V)** | 0.35 max | | **Carbon (C)** | 0.01 max | | **Manganese (Mn)** | 1.0 max | | **Silicon (Si)** | 0.08 max | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.01 max | --- ### **Physical Properties** INCONEL C-276 exhibits excellent physical properties for demanding applications: | Property | Value | |----------|-------| | **Density** | 8.89 g/cm³ | | **Melting Point** | 1323-1371 °C | | **Thermal Conductivity** | 10.2 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.30 μΩ·m | | **Modulus of Elasticity** | 205 GPa | | **Coefficient of Thermal Expansion** | 11.2 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 427 J/kg·K | | **Magnetic Permeability** | <1.001 (essentially non-magnetic) | --- ### **Mechanical Properties** The alloy maintains excellent mechanical properties across temperature ranges: **Room Temperature Properties (Annealed):** - **Tensile Strength:** 790 MPa (min) - **Yield Strength (0.2% Offset):** 415 MPa (min) - **Elongation:** 40% (min) - **Hardness:** 90 HRB (max) **Elevated Temperature Performance:** - **Tensile Strength at 540°C:** 655 MPa - **Yield Strength at 540°C:** 310 MPa - **Excellent creep rupture strength** - **Good fatigue resistance** --- ### **Heat Treatment** **Standard Heat Treatment:** - **Annealing Temperature:** 1150-1175°C (2100-2150°F) - **Soaking Time:** 1-2 minutes per mm thickness - **Cooling:** Rapid water quenching **Stress Relieving:** - Not generally required due to alloy characteristics - When necessary: 900°C (1650°F) followed by rapid cooling --- ### **Key Characteristics & Advantages** 1. **Exceptional Corrosion Resistance** - Excellent resistance to sulfuric, hydrochloric, and phosphoric acids - Outstanding performance in chloride-containing environments - Superior resistance to pitting and crevice corrosion 2. **Versatile Environmental Performance** - Handles both oxidizing and reducing conditions - Excellent resistance to wet chlorine and hypochlorite - Good performance in mixed acid systems 3. **Excellent Fabricability** - Can be welded by all conventional methods - Good hot and cold working characteristics - Suitable for severe forming operations 4. **Weldability** - Minimal susceptibility to weld decay - Maintains corrosion resistance in as-welded condition - No post-weld heat treatment required --- ### **Product Applications** **Chemical Processing Industry:** - Reactors and pressure vessels - Heat exchangers and condensers - Piping systems and pumps - Distillation columns **Pollution Control:** - Flue gas desulfurization systems - Scrubbers and absorbers - Waste water treatment equipment - Incinerator components **Pulp and Paper Industry:** - Digester components - Bleach plant equipment - Chemical recovery systems **Oil and Gas:** - Downhole components - Production tubing - Process equipment in refineries --- ### **International Standards** INCONEL C-276 is recognized under major international specifications: | Standard Type | Standard Number | Product Form | |---------------|-----------------|--------------| | **UNS** | N10276 | Unified Numbering System | | **ASTM** | B575 | Plate, Sheet, and Strip | | **ASTM** | B574 | Rod and Bar | | **ASTM** | B622 | Seamless Pipe and Tube | | **ASME** | SB-575, SB-574 | Code Cases | | **DIN** | 2.4819 | Material Number | | **EN** | NiMo16Cr15W | European Standard | | **ISO** | 15156-3 | MR0175 | --- ### **Summary** **INCONEL C-276 (UNS N10276)** represents the benchmark for corrosion-resistant nickel alloys, offering unparalleled performance in the most aggressive chemical environments. Its balanced composition provides exceptional resistance to a wide spectrum of corrosive media, including strong acids, chlorides, and other harsh chemicals. The alloy's excellent fabricability and weldability, combined with its ability to maintain corrosion resistance in the as-welded condition, make it an ideal choice for chemical processing equipment, pollution control systems, and other demanding applications. Certification to major international standards including ASTM, ASME, and DIN specifications ensures consistent quality and reliability, providing engineers with a proven material solution for applications where corrosion resistance and long-term performance are critical requirements.

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 3326 gallon liquid totes Special package is available on request.