Inconel alloys, renowned for their exceptional resistance to corrosion and high-temperature durability, are a critical component in various high-performance industrial applications. Among these, UN N10276, commonly known as Inconel C-276, stands out as a versatile superalloy widely used in aggressive environments. This article offers an in-depth exploration of UN N10276, detailing its chemical composition, physical and mechanical properties, thermal characteristics, fabrication methods, and diverse applications. Additionally, we highlight the role of Jiangsu Baochen Nickel Alloy Co., Ltd. in providing high-quality Inconel C-276 and related specialty alloys tailored to meet stringent industry demands.

The chemical makeup of UN N10276 is engineered to deliver exceptional corrosion resistance and strength. This superalloy primarily consists of nickel, which forms the base matrix, complemented by chromium, molybdenum, iron, and small additions of other elements such as cobalt, manganese, and silicon. Specifically, Inconel C-276 typically contains 57% nickel, 16% chromium, 16% molybdenum, and 5% iron, with minor constituents enhancing its overall performance. The balanced composition ensures excellent resistance to oxidizing and reducing agents, including strong acids and chloride environments. Understanding this chemical profile is essential for selecting the appropriate alloy for chemical processing and pollution control equipment, where exposure to harsh media is common.

The presence of molybdenum greatly improves pitting and crevice corrosion resistance, while chromium contributes to the formation of a stable oxide film that protects the alloy surface. Iron acts as a strengthening agent, whereas nickel maintains the alloy’s microstructure stability at elevated temperatures, thereby enhancing its high-temperature corrosion resistance and structural integrity.

Inconel C-276 possesses several notable physical attributes that make it suitable for demanding industrial applications. It is a dense alloy, with a density of approximately 8.9 g/cm³, which provides substantial mass and robustness. The melting range of UN N10276 lies between 1290°C and 1350°C, indicative of its capability to withstand extreme thermal conditions without deforming or losing strength.

Furthermore, this superalloy exhibits excellent thermal stability and maintains its microstructural integrity across a wide temperature spectrum. It has moderate thermal conductivity, which ensures gradual heat dissipation, and a coefficient of thermal expansion compatible with many other materials commonly used in industrial systems. These physical properties allow UN N10276 components to endure thermal cycling and rapid temperature changes without cracking or warping, a critical factor in chemical processing and pollution control environments.

The mechanical strength of UN N10276 is a defining characteristic that makes it ideal for structural applications exposed to corrosive and high-temperature conditions. At room temperature, it offers a tensile strength of approximately 655 MPa and a yield strength near 275 MPa, ensuring it can withstand significant mechanical stresses. Its elongation at break exceeds 30%, which indicates a good balance between strength and ductility.

In addition to tensile properties, Inconel C-276 demonstrates excellent creep and stress rupture resistance at elevated temperatures, maintaining durability and mechanical integrity for prolonged periods under load. This attribute is vital for components such as heat exchangers and pressure vessels used in chemical plants and gas scrubbers, where sustained mechanical performance under stress and heat is mandatory.

UN N10276 exhibits outstanding thermal resistance, making it highly effective in environments exposed to high heat and corrosive elements simultaneously. It can operate continuously at temperatures up to 980°C without significant degradation. The alloy’s oxidation resistance is exceptional due to the formation of protective oxide layers primarily composed of chromium and molybdenum oxides, which shield the metal from further corrosion at high temperatures.

Its thermal conductivity, although moderate compared to other metals, is sufficient to prevent localized overheating while maintaining structural stability. The alloy’s low thermal expansion coefficient reduces thermal stresses during temperature fluctuations, which is crucial for maintaining tight seals and joint integrity in industrial systems subject to frequent cycling.

Fabrication of UN N10276 requires specialized techniques due to its high strength and corrosion resistance. Welding is commonly performed using Gas Tungsten Arc Welding (GTAW) or Gas Metal Arc Welding (GMAW) with compatible filler materials to maintain corrosion resistance after joining. Pre-weld cleaning and post-weld heat treatment are recommended to reduce residual stresses and prevent sensitization, which could compromise corrosion resistance.

The alloy exhibits good hot working properties between 900°C and 1200°C, allowing it to be forged, rolled, or extruded into complex shapes. Annealing treatments typically involve heating to 1175°C followed by rapid cooling to restore ductility and relieve internal stresses. Proper heat treatment is critical for optimizing mechanical properties while preserving corrosion resistance.

Due to its robust corrosion and heat resistance, UN N10276 is widely used in chemical processing industries, including reactors, heat exchangers, and piping systems that handle aggressive chemicals such as sulfuric and hydrochloric acids. It is also a preferred material for pollution control equipment like flue gas scrubbers and waste incinerators, where exposure to corrosive gases and high temperatures is prevalent.

Other applications include aerospace components, marine environments, and nuclear reactors where material reliability under extreme conditions is non-negotiable. Jiangsu Baochen Nickel Alloy Co., Ltd. specializes in manufacturing and supplying high-performance Inconel C-276, offering customized alloy solutions that comply with international standards to meet client-specific needs. Their expertise ensures that clients benefit from consistent quality and advanced metallurgy tailored for critical applications.

For more detailed information on their specialty alloy products and production capabilities, visit the Products page. To understand more about Jiangsu Baochen Nickel Alloy Co., Ltd.’s manufacturing expertise, explore their Production line page. For company background and commitment to quality, refer to their About Us section.

UN N10276 or Inconel C-276 is a remarkable nickel-based superalloy combining superior chemical resistance, mechanical strength, and thermal stability. Its carefully engineered chemical composition and physical attributes make it indispensable in harsh chemical and high-temperature environments. The alloy’s fabrication requirements and versatile applications highlight its importance across multiple industries, notably chemical processing and environmental protection. Jiangsu Baochen Nickel Alloy Co., Ltd. stands as a reliable source for high-quality Inconel C-276, providing tailored solutions that meet the rigorous demands of modern industrial applications.