Hastelloy C-276 seamless pipe is a high-performance nickel alloy known for excellent corrosion resistance and high-temperature stability. It is widely used in industries like chemical processing, petrochemicals, and seawater treatment, and is available in various sizes. With strong weldability and resistance to harsh environments, it meets ASTM B622 and B619 standards, making it ideal for demanding applications.
Hastelloy C-276 is a high-performance nickel-based alloy known for its exceptional corrosion resistance and high-temperature performance. It is widely used in industries such as chemical processing, petrochemicals, seawater treatment, and power generation. Below is a detailed introduction to Hastelloy C-276 Seamless Pipe.
Material Overview
Hastelloy C-276 is a nickel-based alloy composed mainly of nickel, molybdenum, chromium, and iron. It is known for its excellent resistance to corrosion, high-temperature stability, and mechanical properties, making it ideal for harsh environments and high-pressure conditions.
Typical Chemical Composition
| Element |
Composition Range |
| Nickel (Ni) |
55-60% |
| Molybdenum (Mo) |
15-17% |
| Chromium (Cr) |
14.5-16.5% |
| Iron (Fe) |
4-7% |
| Cobalt (Co) |
≤ 2.5% |
| Silicon (Si) |
≤ 0.08% |
| Carbon (C) |
≤ 0.01% |
Hastelloy C-276 seamless pipe exhibits exceptional corrosion resistance, good high-temperature performance, and excellent mechanical properties. Below are the main features and advantages
| Property |
Description |
| Corrosion Resistance |
Excellent resistance to acids, chlorides, oxidation, and reducing corrosion, making it stable in harsh environments like strong acids, chlorides, seawater, etc. |
| High-Temperature Performance |
Good resistance to high temperatures, capable of working in environments up to 1100°C, suitable for fluid transport in high-temperature corrosive media. |
| Mechanical Properties |
High tensile strength, yield strength, and elongation, ensuring stability and safety in extreme conditions. |
| Workability |
Good machinability, allowing for conventional machining, cutting, and welding methods. Excellent welding performance, adaptable to various welding processes. |
Due to its excellent corrosion resistance and high-temperature performance, Hastelloy C-276 seamless pipe is widely used in several industries.
| Industry |
Application Examples |
| Chemical Processing |
Reactors, condensers, evaporators, and other equipment used in harsh environments such as hydrochloric acid and sulfuric acid. |
| Petrochemical |
Oil and gas separation units, pipelines, and reactors, providing corrosion resistance in petrochemical processes. |
| Seawater Treatment |
Seawater desalination plants, offshore platforms, and seawater pipelines, with excellent resistance to seawater corrosion. |
| Pharmaceutical Industry |
Reactors, piping systems in pharmaceutical manufacturing, handling corrosive media. |
| Power Generation |
Heat exchangers, boiler pipes, and thermal systems, especially in high-temperature and high-pressure power equipment. |
Size Specifications and Production Standards
Hastelloy C-276 seamless pipes are available in various sizes, which can be customized according to customer requirements. The common size ranges are shown in the table below
| Size Parameter |
Range |
| Diameter |
6 mm - 400 mm (Customizable) |
| Wall Thickness |
1 mm - 50 mm (Customizable) |
| Length |
3m, 6m (Special lengths available) |
| Surface Finish |
Bright, polished, pickled, etc. |
Common Standards
ASTM B622: For seamless pipes and tubes made of nickel-based alloys.
ASTM B619: For seamless pipes made from nickel alloys used in high-temperature, high-pressure environments.
Welding and Installation
Hastelloy C-276 seamless pipes offer excellent weldability, suitable for various welding methods such as TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding. It is recommended to use appropriate shielding gases and filler materials to ensure the strength and corrosion resistance of welded joints. Post-welding heat treatment may be required to relieve internal stress and improve overall performance.
Maintenance and Care
Although Hastelloy C-276 seamless pipe offers outstanding corrosion resistance and high-temperature performance, it is still important to periodically inspect the system for corrosion, wear, and fouling, especially in extreme environments. Regular cleaning and maintenance are essential to extend the life of the pipe, particularly in high-temperature and high-pressure applications.
