09CuPCrNi-B Seamless Corten Steel Pipe

09CrCuSb (ND steel) seamless steel tubes are widely used in the manufacture of economizers, air preheaters, heat exchangers, and evaporators for high-sulfur flue gas equipment, designed to resist sulfur flue gas dew point corrosion.

The steel contains alloying elements such as copper (Cu 0.25–0.45%), chromium (Cr 0.30–0.65%), and antimony (Sb 0.05–0.15%), which form a stable protective layer when exposed to high-sulfur flue gas environments and also provide resistance to chloride ion corrosion.

09CrCuSb seamless tubes have a minimum yield strength of 245 MPa, a minimum tensile strength of 410 MPa, and an elongation of ≥25%, ensuring reliability and long service life of equipment under high temperature, high humidity, and acidic conditions.

09CrCuSb tubes from China are mainly used in power plants and refineries to manufacture coal economizers, air preheaters, heat exchangers, and evaporators, which operate in high-sulfur flue gas environments to resist condensation corrosion.

The tubes are commonly available with outer diameters of Φ20–426 mm, wall thicknesses of 2–50 mm, and lengths up to 12 m.

The specific chemical composition of 09CrCuSb steel may vary slightly depending on the manufacturing standards and requirements. It typically contains elements such as carbon (C), silicon (Si), manganese (Mn), chromium (Cr), copper (Cu), antimony (Sb), phosphorus (P), and sulfur (S).

09CrCuSb seamless steel pipes are widely used in the manufacture of economizers, air preheaters, heat exchangers, evaporators, and other equipment operating in high-sulfur environments.

ND Steel is known for its excellent resistance to sulfuric acid corrosion at low temperatures and contains alloying elements such as copper (Cu 0.25–0.45%), chromium (Cr 0.30–0.65%), and antimony (Sb 0.05–0.15%), which form a stable protective layer under high-sulfur conditions.

It is extensively used in equipment that operates in environments with high sulfur-containing gases, including economizers, air preheaters, heat exchangers, and evaporators that are subjected to sulfur-bearing flue gas condensation corrosion.

The widespread use of ND Steel in power plants and refineries is due to its ability to withstand the corrosive effects of sulfur-laden flue gases. 09CrCuSb seamless tubes have a minimum yield strength of 245 MPa, a minimum tensile strength of 410 MPa, and elongation of ≥25%, ensuring long-term reliability under high temperature, high humidity, and acidic conditions.

• Typical applications include:

Economizers: Devices that recover waste heat from flue gases and preheat the boiler feedwater, often operating at temperatures around 150–200°C.

Air Preheaters: Units that improve boiler efficiency by preheating combustion air using flue gas heat, commonly exposed to highly corrosive acidic condensates.

Heat Exchangers: Equipment transferring heat between two fluids, crucial in thermal processes, with tubes often Φ20–426 mm in diameter and wall thickness 2–50 mm.

Evaporators: Used in desalination plants and industrial processes where liquids are converted into vapor, requiring long-term resistance to acidic condensation corrosion.

By leveraging the properties of ND Steel, these critical components are better equipped to handle the corrosive challenges of sulfurous environments, enhancing both their operational efficiency and service life.

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