09CrCuSb high temperature corrosion resistant seamless pipe

09CrCuSb seamless tube is the most ideal steel materials in sulphuric and acid corrosion surroundings at low temperature.09CrCuSb seamless pipe also called as ND alloy seamless pipe which mainly used power plant,heat exchangers,oil plants to resistance higher Sulphuric corrosion.

ND steel (09CrCuSb) is recognized as one of the most advanced materials for sulfuric acid low-temperature dew point corrosion resistance both in China and internationally.

This alloy steel contains approximately 0.09% C, 1.2% Cu, and 0.3% Sb, which work synergistically to form a dense and adherent protective film on the steel surface during service. This film effectively prevents further corrosion caused by condensed sulfuric acid vapor and acidic flue gases.

In practical applications, 09CrCuSb seamless steel tubes demonstrate exceptional resistance to sulfur-containing flue gas corrosion under dew point conditions ranging from 100°C to 180°C, where ordinary carbon steel would suffer a corrosion rate exceeding 2–3 mm/year, while ND steel maintains rates below 0.05 mm/year.

Due to its outstanding corrosion performance and stable mechanical strength (with a yield strength of ≥ 245 MPa and tensile strength of 415–550 MPa), ND seamless pipes are widely used in:

Economizers and air preheaters of coal-fired boilers

Heat exchangers and evaporators in flue gas desulfurization systems

Chimney liners and condensers in chemical and power plants

These properties make 09CrCuSb ND seamless steel pipe a cost-effective and durable solution for long-term service in high-sulfur, high-moisture environments.