09CrCuSb(ND) seamless steel tube for sulfuric acid resistance, low temperature dew point and corrosion
- 09CrCuSb(ND) seamless steel tube Production Standard
GB150《Pressure Vessel》
09CrCuSb (ND steel) steel pipe used in power plants and refineries to manufacture economizers, air preheaters, heat exchangers and evaporators that work in high-sulfur flue gas to protect against sulfur-containing flue gas condensation.
Chemical Composition
| Grade | Chemical Composition(%) | |||||||
| C | Si | Mn | Cr | Cu | Sb | P | S | |
| 09CrCusb | ≤0.10 | 0.20-0.40 | 0.35-0.65 | 0.70-1.20 | 0.25-0.45 | ≤0.10 | ≤0.10 | ≤0.10 |
Mechanical Properties
| Grade | Tenslle Strength(MPa) | Yield Strength(MPa) | Elongation(%) |
| 09CrCuSb | 390-550 | ≥245 | ≥25 |
Chemical composition in GB 150.2-2011
| 09CrCuSb | |||||||
| C | Si | Mn | P | S | Cr | Cu | Sb |
| ≤0.12 | 0.20~0.40 | 0.35~0.65 | ≤0.030 | ≤0.020 | 0.70~1.10 | 0.25~0.45 | 0.04~0.10 |
09CrCuSb (ND steel) Tubes Product application
09CrCuSb (ND steel) Tubes are widely used in the manufacture of economizer, air preheater, heat exchanger, and evaporator in the service of high sulfur flue gas equipment, used to resist the dew point corrosion of sulfur flue gas. 09CrCuSb Seamless Tubes also have the ability of chloride ion corrosion resistance. 09CrCuSb Tubes from China are used in power plants and refineries to manufacture coal economizers, air preheaters, heat exchangers, and evaporators, which work in the high sulfur flue gas to resist condensation corrosion of sulfur flue gas. It is the ideal steel for low-temperature dew point corrosion resistance of sulfuric acid at home and abroad. Low-alloy 09CrCuSb Tubes are also widely used.
Low alloy steel-09CrCuSb (ND steel) for sulfuric acid proof dew point corrosive seamless steel pipe Products are widely used in petrochemical, electric power and other industries.
ND steel is a new type of low alloy structural steel, compared with other steel, like low-carbon steel, Corten, CR1A, ND steel has the advantage of excellent corrosion resistance and mechanical property. The experimental results showed that the corrosion resistance of ND steel in aqueous solution like sulfuric acid, hydrochloric acid and sodium chloride is higher than carbon steel. The most prominent feature is the ability of sulfuric acid dew point corrosion resistance; the mechanical property is higher and stable than carbon steel from room temperature to 500℃, and the welding performance is nice. ND steel always used for manufacturing economizer, heat exchanger, air pre-heater, since 1990, ND steel has widely been used in the industry of petrifaction and electricity.
Comparison of corrosion rate between ND steel and other steel grades (70 ℃ - 50% H2SO4 solution)
| Steel grade | 09CrCuSb(ND steel) | CRIR(Japan) | 1Cr18Ni9 | Corten | STEN(Japan) | A3(Q235B) |
| Corrosion rate | 7.30 | 13.40 | 21.70 | 63.00 | 27.4 | 103.50 |
| multiple | 1 | 1.84 | 2.97 | 8.63 | 3.75 | 14.11 |