Corten steel, ND steel and JNS steel

Corten steel, also called weathering resistance steel, is mainly used for the economizer working in high sulfur gas, air preheater, heat exchanger and the evaporator, are used to resist corrosion, sulfur-containing flue gas condensation with excellent sulfur ions and corrosion resistant ability.

ND steel, 09 CrCuSb steel (namely 09 chromium copper antimony)Product features:Mainly used for: high sulfur-containing flue gas in the work of economizer, air preheater, the heat exchanger and the evaporator, used to resist corrosion, sulfur-containing flue gas condensation has excellent sulfur ions, corrosion resistant ability.Products made of steel sheet, seamless steel pipe, fins and tubes.Steel: 3mm to 20mm pipes: Φ10-89-mm seamless pipe or seam pipespiral fin tube. B12-164mm steel strip fins, 1-2 mm (thickness)Main chemical composition: C≤0.12  Si 0.2-0.4   Mn 0.35-0.65  Cr 0.5-1.25  Ni ≤0.35 Cu 0.25-0.45 Sb ≤0.12    P 0.07-0.12    S ≤0.035  Yield point ≥310       tensile strength ≥450         higher elongation ≥25actual achieved≥38    

JNS new acid resistant steelJNS sulfuric acid resistant steel - the new acid-resistant steel after corten steel and ND steel. In the industrial area of electric power, metallurgy and petrochemical, the main fuel of flue gas treatment system of coal or heavy oil, such as boiler low temperature part of the air preheater and economizer, chimney and flue desulphurization device, etc., generally will have higher sulfur content in fuel, sulfuric acid formed under the dew point temperature and corrosion problem, this is called "the sulfuric acid dew point corrosion" phenomenon.Unlike ordinary atmospheric corrosion, not only subjected to ordinary carbon steel corrosion, the corrosion and make stainless steel corrosion, so great harm.With high sulfur content fuel boiler smoke contains SO2 and SO3, they combine with moisture in the flue gas generating sulfurous acid and sulfuric acid, and condensation on the low temperature of boiler components, cause the sulfuric acid dew point corrosion.Made of carbon-steel boiler parts in low temperature, due to the sulfuric acid dew point corrosion resistance is very poor, severe corrosion and short service life, therefore, the research, development and use of the sulfuric acid dew point corrosion resistant steel to improve the low temperature steel sleeve chimney, boiler parts service life has very important significance.