Aperam Superimphy 276 Bar-Corrosion，1

### **Product Introduction: Aperam Superimphy® 276 Bar - Corrosion Resistant Nickel Alloy** **Overview** Aperam Superimphy® 276 Bar is a premium nickel-chromium-molybdenum-tungsten alloy designed to deliver exceptional corrosion resistance in the most severe environments. This versatile alloy offers outstanding performance across a wide spectrum of corrosive media, including both oxidizing and reducing conditions. With its optimized chemical composition and superior metallurgical properties, Superimphy 276 Bar provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, making it an ideal choice for demanding applications in chemical processing, pollution control, and marine engineering. --- #### **Chemical Composition (Typical % by Weight)** | Element | Content (%) | Role & Benefit | |---------|-------------|---------------| | **Nickel (Ni)** | Balance | Provides fundamental corrosion resistance and matrix stability | | **Chromium (Cr)** | 14.5 - 16.5 | Imparts resistance to oxidizing media and high-temperature oxidation | | **Molybdenum (Mo)** | 15.0 - 17.0 | Provides exceptional resistance to reducing acids and pitting corrosion | | **Tungsten (W)** | 3.0 - 4.5 | Enhances resistance to reducing acids and localized corrosion | | **Iron (Fe)** | 4.0 - 7.0 | Balances microstructure and cost-effectiveness | | **Manganese (Mn)** | ≤ 1.0 | Aids in manufacturability and controls sulfur | | **Vanadium (V)** | ≤ 0.35 | Trace element for process control | | **Cobalt (Co)** | ≤ 2.5 | Controlled residual element | | **Carbon (C)** | ≤ 0.01 | Minimized to prevent intergranular corrosion | | **Silicon (Si)** | ≤ 0.08 | Kept low to maintain corrosion resistance | *Note: Superimphy is a registered trademark of Aperam. This alloy is analogous to UNS N10276/W.Nr. 2.4819.* --- #### **Physical & Mechanical Properties** **Physical Properties:** - Density: 8.89 g/cm³ (0.321 lb/in³) - Melting Range: 1323-1371°C (2413-2500°F) - Thermal Expansion: 11.2 μm/m·°C @ 20-100°C - Thermal Conductivity: 11.1 W/m·K @ 100°C - Modulus of Elasticity: 205 GPa (29.7 x 10^6 psi) - Magnetic Permeability: Typically <1.001 **Mechanical Properties (Room Temperature):** - Tensile Strength: 690 MPa (100 ksi) minimum - Yield Strength (0.2% Offset): 283 MPa (41 ksi) minimum - Elongation: 40% minimum - Hardness: HRB ≤ 100 - Impact Strength: ≥ 135 J at 20°C --- #### **International Standards and Specifications** - **ASTM B574:** UNS N10276 Bar and Wire - **ASTM B575:** UNS N10276 Plate, Sheet, and Strip - **ASME SB-574/SB-575:** Pressure vessel applications - **EN 2.4819:** European material designation - **NACE MR0175/ISO 15156:** Sour service compliance - **ASTM B622:** Seamless Pipe and Tube - **PED 2014/68/EU:** Pressure equipment directive - **DNV GL, ABS, LR:** Marine and offshore certifications --- #### **Product Applications** **Chemical Processing Industry:** - Reactors and pressure vessels for aggressive chemicals - Heat exchangers and condensers in corrosive service - Pumps, valves, and fittings for acid handling - Mixing tanks and agitators for corrosive media **Pollution Control:** - Flue gas desulfurization systems - Scrubbers and absorbers for acid gases - Waste water treatment equipment - Chemical waste incineration systems **Pharmaceutical Industry:** - Process equipment requiring high purity - Critical component manufacturing - Reaction vessels and purification systems **Oil & Gas Production:** - Downhole components in sour service - Process piping for corrosive fluids - Offshore platform equipment - Wellhead components in aggressive environments --- #### **Key Advantages** 1. **Exceptional Versatility**: Resists a wider range of corrosives than most commercial alloys 2. **Superior Localized Corrosion Resistance**: Excellent resistance to pitting and crevice corrosion in chloride solutions 3. **Out-of-Service Performance**: Low carbon content minimizes sensitization and intergranular attack 4. **Excellent Fabricability**: Good welding characteristics with minimal susceptibility to post-weld cracking 5. **High-Temperature Stability**: Maintains corrosion resistance at elevated temperatures 6. **Proven Reliability**: Extensive service history in the most aggressive industrial environments 7. **Pitting Resistance Equivalent (PRE ≥ 68)**: Outstanding resistance to localized corrosion --- **Conclusion** Aperam Superimphy® 276 Bar represents the pinnacle of corrosion-resistant nickel alloy technology for severe service applications. Its sophisticated chemical composition, featuring high molybdenum content balanced with chromium and tungsten, provides unparalleled resistance to a broad spectrum of corrosive media. The alloy's excellent combination of mechanical properties, fabricability, and proven corrosion performance makes it the material of choice for critical applications in chemical processing, pollution control, and other demanding industries where equipment reliability and long service life are essential. Supported by comprehensive international standards and quality certifications, Superimphy 276 Bar delivers consistent, reliable performance in the world's most challenging operating conditions.

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 3420 gallon liquid totes Special package is available on request.