Product Overview
The 09CuPCrNi-A Corten Steel Pipe is a high-strength, low-alloy atmospheric corrosion-resistant steel pipe widely used in power plants, boiler plants, oil refineries, and petrochemical industries.

Known for its excellent resistance to sulfur ions, hydrochloric acid, and other acidic environments, this pipe is designed to perform reliably in high-sulfur flue gas systems such as gas ducts, air preheaters, heat exchangers, and evaporators.
As a representative grade of Cu-P series weathering steel, 09CuPCrNi-A provides long-term durability, reduced maintenance costs, and enhanced heat transfer efficiency, making it the preferred material for critical industrial applications.
Key Features
Outstanding Corrosion Resistance: Designed to resist condensation corrosion of sulfur-containing flue gas, ensuring excellent protection against sulfur and acid attack.
High Mechanical Strength: Delivers reliable yield and tensile strength, ensuring long service life in demanding environments.
Efficient Heat Transfer: Spiral grooved tubes significantly improve heat transfer efficiency-up to 1.25 times higher than standard pipes.
Cost-Effective: Reduces steel usage and space requirements of heat exchange equipment, with proven reliability and economy.
Wide Application: Extensively used in boilers, heat exchangers, power generation, and petrochemical equipment.
Applications

Gas ducts and flue gas systems in power plants
Air preheaters and heat exchangers
Evaporators in high-sulfur flue gas environments
Boiler plants and petrochemical industries
Oil refineries and industrial furnaces
Chemical Composition of 09CuPCrNi-A
| Grade | C (max %) | Si (%) | Mn (%) | P (%) | S (max %) | Cr (%) | Cu (%) | Ni (%) |
|---|---|---|---|---|---|---|---|---|
| 09CuPCrNi-A | ≤ 0.12 | 0.25 – 0.75 | 0.20 – 0.50 | 0.06 – 0.12 | ≤ 0.020 | 0.30 – 1.25 | 0.25 – 0.50 | 0.12 – 0.65 |
Mechanical Properties of 09CuPCrNi-A
| Thickness (mm) | Yield Strength (Min MPa) | Tensile Strength (MPa) | Elongation (Min %) | Delivery Condition |
|---|---|---|---|---|
| > 4 mm | 345 | 480 | 24 | Hot rolling |
| ≤ 4 mm | 310 | 440 | 26 | Cold rolling |
Equivalent Grades
| China (GB) | USA | DIN | JIS | AFNOR | UNI | EN |
|---|---|---|---|---|---|---|
| 09CuPCrNi-A | GR.1 | 9CrNiCuP324 | SPA-H | E36WA3 | Fe510C1K1 |
Fe51C1KI
|
Implementation Standards
- Direct high-frequency electric welded steel pipe: GB/T13793-92
- Structural seamless steel pipe: GB/T8162-2008
- Acceptance, packaging, marking, and quality certificate: GB2102-88
- ND Steel Pipe: GB150-98 / GB/T6728
- Spiral groove tube: GB3087-82 / DG1017-94
Technical Requirements & Services
Conforms to atmospheric corrosion resistance Guide G101
Low temperature impact test down to -40°C
Hydrostatic test or nondestructive electric test available
Mill Test Certificate provided according to EN 10204 TYPE 3.1 or 3.2
Surface Protection Options: Black, Varnish, Shop Primer Coating, Bevelled Ends, Pipe Caps
Why Choose 09CuPCrNi-A Corten Steel Pipe
With its unique weathering properties, excellent sulfur corrosion resistance, and proven durability in extreme environments, the 09CuPCrNi-A Corten Steel Pipe is the ideal solution for industries requiring long-term performance and low maintenance costs.

Whether used in air preheaters, boilers, or petrochemical plants, it ensures safety, reliability, and efficiency.
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