Pipes are huge in different industries, from the oil and gas sectors to sewerage and water supply utilities. And when it comes to selecting the right pipe for a specific application, one material that has stood out over the years is the Hastelloy C276. This versatile alloy is known for its excellent resistance to high-temperature and corrosive environments, making it an ideal choice for various industrial applications. This blog post delve into the composition, physical and mechanical properties, heat treatment, corrosion resistance, and uses of Hastelloy c276 pipes.
Hastelloy C276 Pipes Composition
C276 Hastelloy Pipe is a nickel-molybdenum-chromium-tungsten alloy with small amounts of iron, cobalt, and manganese. Adding these elements gives rise to its unique chemical and mechanical properties, such as corrosion resistance, flexibility, and high strength. This alloy also has a low carbon and silicon content, which helps prevent precipitates from forming that can result in intergranular corrosion.
| Hastelloy C276 | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr |
| Balance | 0.010 max | 15.00 – 17.00 | 1.00 max | 0.08 max | 4.00 – 7.00 | 0.04 max | 0.03 max | 2.5 max | 14.50 – 16.50 |
Hastelloy C276 Pipes Physical and Mechanical Properties
UNS N10276 Pipe have excellent physical properties, making them an ideal choice for high-temperature and high-pressure applications. It has a melting point of 1370°C and a density of 8.89 g/cm³. This alloy is highly malleable and easily fabricated into different shapes and sizes. Hastelloy C276 also has exceptional mechanical properties, such as high tensile strength (around 760 MPa) and yield strength (around 350 MPa). It also has good impact resistance, making it ideal for applications where shock resistance is an important consideration.
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 52,000 , MPa – 355 | Psi – 1,15,000 , MPa – 790 | 40 % |
Hastelloy C276 Pipes Equivalent
| ALLOY | UNS | WERKSTOFF NR./ DIN | AFNOR | EN | JIS | OR | GOST |
| Hastelloy C276 | N10276 | 2.4819 | – | NiMo16Cr15W | NW 0276 | ЭП760 | ХН65МВУ |
Hastelloy C276 Pipes Heat Treatment
Hastelloy C276 is a hardenable nickel alloy and can be heat-treated to improve its properties. Annealing is the most common heat treatment process used for Hastelloy C276 pipes. This process involves heating the material to 760–870°C for several hours, followed by air-cooling. The annealing process helps improve the alloy’s flexibility, making it easier to work with. Another heat treatment process is quenching and tempering, which involves heating the material to high temperatures, quenching it in water, and then tempering it to improve its mechanical properties.
Hastelloy C276 Pipes Corrosion Resistance
One of the key reasons individuals opt for ASTM B619 UNS N10276 is their exceptional corrosion resistance. This alloy is highly resistant to oxidizing and reducing acids and chlorinated solvents, wet chlorine gas, seawater, and brine. It’s also resistant to stress-corrosion cracking and pitting, making it ideal for applications in aggressive environments requiring corrosion resistance.
Hastelloy C276 Pipes Uses
2.4819 Pipe are used in various industrial applications, including chemical processing, petrochemicals, oil and gas, power generation, and pharmaceuticals. In chemical processing, hastelloy c276 pipes are used in equipment such as distillation columns, heat exchangers, and reactors. In the oil and gas industry, hastelloy c276 pipes are used in pipeline systems, valves, and pumps, exposed to harsh environmental conditions. The power generation industry uses steam generators, boilers, and heat exchangers due to their high temperature and high-pressure resistance.
Conclusion:
2.4819 Grade Pipe are an excellent choice for applications that require resistance to high-temperature and corrosive environments. The composition of this alloy provides a unique set of physical and mechanical properties that make it ideal for use in a wide range of industrial applications. With its exceptional heat treatment and corrosion resistance properties, hastelloy c276 pipes can handle tough environments and provide a high service life.
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