Grade 09CrCuSb Hot Rolled Steel Plate ND Steel Plate Standard Spot Cutting Thickness 10-100mm
Corrosion-resistant alloy steel material
09CrCuSb is a high-performance corrosion-resistant alloy steel material, which is mainly used to manufacture equipment working in high-sulfur flue gas, such as economizers, air preheaters, heat exchangers and evaporators, to resist condensation corrosion of sulfur-containing flue gas. This material has high corrosion resistance, high strength and good toughness, and is suitable for chemical, petroleum, pharmaceutical and food industries.
The chemical composition of 09CrCuSb mainly includes carbon (C), silicon (Si), manganese (Mn), chromium (Cr), copper (Cu), antimony (Sb), phosphorus (P) and sulfur (S), among which the carbon content does not exceed 0.10%, the silicon content is between 0.20-0.40%, the manganese content is between 0.35-0.65%, the chromium content is between 0.70-1.20%, the copper content is between 0.25-0.45%, the antimony content does not exceed 0.10%, and the phosphorus and sulfur contents do not exceed 0.10%.
| C | Si | Mn | P | S | Cr | Sb | Cu |
| ≤0.10% - ≤0.12% | 0.20% - 0.40% | 0.35% - 0.65% | ≤0.030 | ≤0.020 | 0.70% - 1.20% - 1.10% | 0.04% - 0.10% | 0.25% - 0.45% |
In addition, 09CrCuSb also has the characteristics of high corrosion resistance, high temperature resistance and oxidation resistance, high cost performance, and is particularly suitable for use in acidic and high humidity environments. This material is widely used in the fields of preheaters and heat exchangers in industry.
The Solution: 09CrCuSb (ND Steel)
Developed specifically to withstand sulfuric acid dew point corrosion, 09CrCuSb (ND steel) is a low-alloy steel that combines corrosion resistance with mechanical strength. It is the material of choice for industries dealing with flue gases and acidic environments.
Critical features of ND steel include:
- Excellent Sulfuric Acid Resistance: The inclusion of chromium (Cr), copper (Cu), and antimony (Sb) enhances the steesteel’slity to resist sulfuric acid corrosion, especially in high-dew-point conditions.
- Low-Temperature Performance: ND steel exhibits superior performance in low-temperature environments typical of economizers and air preheaters, where sulfuric acid condensation is most likely to occur.
- High Strength and Durability: The alloy composition ensures that the steel remains strong and durable under fluctuating temperatures and corrosive conditions, reducing the need for frequent replacements or repairs.
- Cost-Effective Maintenance: While ND steel may have a higher upfront cost than other materials, its longevity and corrosion resistance translate into significant cost savings over time due to fewer repairs and less downtime.
Common Applications
ND steel is instrumental in industrial applications where sulfuric acid corrosion is a concern:
- Boilers: Sulfur-containing fuel in boilers makes ND steel ideal for parts susceptible to acid dew point corrosion, such as heat-exposed surfaces.
- Heat Exchangers: In applications where the temperature drop results in condensation of sulfuric acid, ND steel offers a protective solution, increasing the lifespan of heat exchanger tubes.
- Economizers: Located in the calmer sections of the flue gas path, economizers are prone to dew point corrosion. ND steel assistance helps maintain efficiency and reduce operational costs.
- Air Preheaters: These components are at significant risk due to the cooling of flue gases, making ND steel crucial for durability and performance in acidic environments.
Advantages of Using 09CrCuSb in These Applications
- Improved Operational Lifespan: ND steel’s exceptional resistance to sulfuric acid prolongs the life of boilers, heat exchangers, and air preheaters, reducing the need for frequent replacements.
- Lower Maintenance Costs: Thanks to its durability, ND steel minimizes the need for repairs, saving time and money. Reduced corrosion also means fewer emergency shutdowns, improving overall system reliability.
- Increased Efficiency: By mitigating the damaging effects of dew point corrosion, ND steel helps maintain heat transfer efficiency in boilers and heat exchangers, leading to optimal energy usage and lower fuel costs.
