904L Stainless Steel Pipe (UNS N08904): Superior Performance in Extreme Corrosive Environments
When dealing with highly corrosive environments-such as strong acids, seawater, and chlorides—standard stainless steels like 304 or 316 often reach their limits. For industries that demand superior corrosion resistance and long-term reliability, 904L stainless steel pipe(UNS N08904) stands out as a proven solution. At Ganyeah Group, we supply premium-grade 904L stainless steel pipes to support your most demanding applications with unmatched durability.
What is 904L stainless steel?
904L stainless steel (UNS N08904) is a high-alloy austenitic grade specifically developed to combat extreme corrosion. With a carefully engineered chemical composition, 904L resists both uniform and localized corrosion, making it ideal for use in environments involving aggressive acids and high chloride levels.
904L stainless steel pipes in warehouse
Chemical Composition of 904L
- Nickel (23–28%): Enhances resistance to stress corrosion cracking and stabilizes the austenitic structure.
- Chromium (19–23%): Forms a stable passive film that protects against general corrosion.
- Molybdenum (4–5%): Increases resistance to pitting and crevice corrosion in chloride-laden environments.
- Copper (1–2%): Offers excellent performance in reducing acids like sulfuric and phosphoric acid.
- Low Carbon (≤ 0.02%): Prevents carbide precipitation during welding, improving resistance to intergranular corrosion.
- Nitrogen (≤ 0.10%): Adds strength and improves pitting resistance.
This combination ensures outstanding resistance in environments where conventional stainless steels fail.
Mechanical Properties of 904L Pipe
- Tensile Strength: ≥ 490 MPa
- Yield Strength: ≥ 220 MPa
- Elongation: ≥ 35%
- Hardness: 150–200 HB
- Impact Toughness: Excellent, even at sub-zero temperatures
Key Advantages of 904L Stainless Steel Pipe
- Superior Corrosion Resistance: Performs exceptionally in reducing acids and chloride-rich conditions.
- Weldability: The low carbon content reduces the risk of intergranular corrosion after welding.
- Durability: Suitable for high-pressure, high-temperature, and aggressive chemical environments.
- Formability: High ductility allows for complex fabrication and bending.
- Long-Term Cost Efficiency: Though the initial cost is higher than 316L, reduced maintenance and longer service life lower total ownership costs.
Common Applications of 904L Stainless Steel Pipe
904L stainless steel pipes are trusted in industries where corrosion resistance is non-negotiable:
The unique corrosion resistance and mechanical properties of 904L stainless steel pipe make it indispensable in numerous critical industries:
- Chemical Processing Industry: Particularly suitable for equipment handling sulfuric acid, phosphoric acid, nitric acid, and other aggressive acids. This includes heat exchangers, tanks, and process piping.
- Fertilizer Production: Essential for phosphoric acid production, where highly corrosive conditions exist.
- Oil & Gas Industry: Used for components exposed to highly corrosive brine, sour gas, and other aggressive fluids, especially in offshore and subsea applications.
- Marine and Seawater Environments: Used in piping systems, heat exchangers, and other equipment exposed to highly corrosive seawater.
- Pulp and Paper Industry: Used in bleaching systems and other components exposed to aggressive chloride-containing media.
- Pollution Control Equipment: Such as scrubbers in power generation plants, handling flue gas desulfurization.
- Pharmaceutical Industry: Used for highly corrosive process equipment where purity and corrosion resistance are critical.
Why Choose Ganyeah Group as Your 904L Pipe Supplier?
Ganyeah Group provides a complete range of 904L stainless steel pipes, tailored for demanding industrial needs:
- ✅ Certified Quality: Fully traceable with MTCs and compliant with ASTM A312, A269, and related standards.
- ✅ Large Inventory: Available in various diameters, wall thicknesses, and lengths—seamless and welded.
- ✅ Technical Expertise: Our team offers material selection support based on your specific application.
- ✅ Global Logistics: Fast, reliable worldwide delivery by sea, land, or air.
Call to Action
Protect your critical systems with the superior performance of 904L stainless steel pipe.
📩 Contact Ganyeah Group today for a competitive quote and technical consultation.