Alloy C276 Nickel Pipe And Tube • UNS N10276 • WNR 2.4819
Alloy C276 Nickel Pipe and Tube • UNS N10276 • WNR 2.4819
Specifications
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- UNS Number: N10276
- Werkstoff Number (WNR): 2.4819
Chemical Composition
The chemical composition of Alloy C276 typically includes:
- Nickel (Ni): 52.0 min
- Chromium (Cr): 14.5 – 16.5
- Molybdenum (Mo): 15.0 – 17.0
- Iron (Fe): 4.0 – 7.0
- Tungsten (W): 3.0 – 4.5
- Cobalt (Co): 2.5 max
- 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
- Vanadium (V): 0.35 max
Mechanical Properties
- Tensile Strength: 690 MPa (100 ksi) min
- Yield Strength (0.2% Offset): 283 MPa (41 ksi) min
- Elongation: 40% min
- Hardness: 100 HRB max
Physical Properties
- Density: 8.89 g/cm³
- Melting Point: 1370 – 1390 °C (2500 – 2530 °F)
- Specific Heat: 427 J/kg-°C (0.102 Btu/lb-°F)
- Thermal Conductivity: 10.2 W/m-°C (70.8 Btu-in/ft²-h-°F)
Applications
Alloy C276 is widely used in various industries due to its exceptional resistance to corrosion and ability to withstand high temperatures and pressures. Common applications include:
- Chemical Processing: Equipment and components for chemical processing, such as reactors, heat exchangers, and piping systems.
- Pollution Control: Systems designed for air pollution control, including scrubbers and stack liners.
- Oil and Gas: Components exposed to sour gas environments and subsea applications.
- Pulp and Paper: Digesters and bleach equipment.
- Marine: Seawater and brine processing equipment.
Corrosion Resistance
Alloy C276 is known for its outstanding resistance to a variety of corrosive media, including:
- Oxidizing and Reducing Environments: Excellent resistance to both oxidizing and reducing acids.
- Pitting and Crevice Corrosion: High resistance to pitting and crevice corrosion in chloride-containing environments.
- Stress-Corrosion Cracking: Superior resistance to stress-corrosion cracking, particularly in chloride-laden environments.
- Sulfuric and Hydrochloric Acid: Excellent performance in sulfuric and hydrochloric acid solutions.
Fabrication and Welding
Alloy C276 is readily fabricated using standard techniques:
- Forming: Good ductility allows for cold and hot forming.
- Machining: Can be machined using standard methods for high-strength superalloys.
- Welding: Can be welded using all common welding techniques, including TIG, MIG, and shielded metal arc welding. Filler metals of matching composition are recommended.
Standards and Specifications
- ASTM: B619, B622, B626 (tubes); B574 (bars and rods); B575 (plates, sheets, and strips)
- ASME: SB619, SB622, SB626 (tubes); SB574 (bars and rods); SB575 (plates, sheets, and strips)
- DIN: 17751
- ISO: 6208
Summary
Alloy C276 is a highly durable and corrosion-resistant material suitable for a wide range of applications in harsh environments. Its versatility, combined with excellent mechanical and physical properties, makes it a preferred choice for critical components in chemical processing, pollution control, oil and gas, marine, and other industries requiring reliable performance under severe conditions.
Alloy 400 is a nickel-copper alloy known for its excellent corrosion resistance and high strength across a wide temperature range. It is particularly effective in reducing and oxidizing environments and offers good mechanical properties at sub-zero temperatures.
Alloy 600, also known as Inconel 600, is a nickel-chromium alloy renowned for its exceptional resistance to high-temperature corrosion and oxidation.
INCONEL Alloy 625 (UNS N06625 / WNR 2.4856) is a highly versatile alloy widely used across various industries due to its exceptional mechanical properties, outstanding corrosion resistance, and excellent fabricability. It is particularly well-suited for high-stress and high-temperature applications in aerospace, marine, chemical processing, oil and gas, and power generation sectors.
Nickel 690 (UNS N06690 / WNR 2.4642) is a versatile alloy with excellent welding and fabrication characteristics. By adhering to best practices and understanding the specific requirements of this alloy, engineers and fabricators can ensure high-quality results in various industrial applications. Its robustness in resisting corrosion and maintaining mechanical integrity at high temperatures makes it a preferred choice for demanding environments.
Nickel Alloy 825 (UNS N08825 / WNR 2.4858) is a versatile alloy with excellent resistance to corrosion and high-temperature stability. Its favorable welding and fabrication characteristics make it a preferred choice for demanding industrial applications. By adhering to best practices and understanding the specific requirements of this alloy, engineers and fabricators can ensure high-quality results and reliable performance in various environments such as chemical processing, oil and gas, pollution control, and nuclear power.
Nickel Alloy 800, 800H, and 800HT (UNS N08800/N08810/N08811) offer excellent strength and resistance to oxidation and carburization at high temperatures, making them suitable for demanding industrial applications. By adhering to best practices and understanding the specific requirements of these alloys, engineers and fabricators can ensure high-quality results and reliable performance in various environments, including chemical processing, petrochemical and refining, power generation, and nuclear power industries.
