904L Super Austenitic Pipes 2in, ASTM B677, Acid-Proof, Chemical Reactors
904L Super Austenitic Stainless Steel Pipes (2" Diameter) by Jiangsu China Steel Union Industrial Co., Ltd are engineered for extreme corrosive environments in chemical processing, sulfuric acid production, and offshore oil refining. Compliant with ASTM B677, these pipes contain elevated chromium (19–23%), nickel (23–28%), molybdenum (4–5%), and copper (1–2%) to resist pitting, crevice corrosion, and stress corrosion cracking (SCC) in sulfuric, phosphoric, and hydrochloric acid media. The 2" Sch40S dimensions (OD: 60.3mm, Wall Thickness: 3.91mm) ensure structural integrity under high-pressure, high-temperature reactor conditions, while seamless manufacturing eliminates weld-related failure risks. Ideal for aggressive chemical transport, these pipes outperform standard 316L/317L alloys in acidic and chloride-rich environments.
2. Detailed Specifications
| Parameter | Details |
| Material | 904L Super Austenitic (UNS N08904 / ASTM B677) |
| Element Composition | Cr: 19–23%, Ni: 23–28%, Mo: 4–5%, Cu: 1–2%, Mn: ≤2%, Si: ≤1%, C: ≤0.02%, Fe: Balance |
| Dimensions | Nominal Size: 2" (60.3mm OD), Wall Thickness: 3.91mm (Sch40S), Length: 6–12m (Customizable) |
| Certifications | ASTM B677, NACE MR0175, PED 2014/68/EU, EN 10216-5, TÜV SÜD, ISO 9001:2015 |
| Mechanical Properties | Tensile Strength: ≥490 MPa
Yield Strength: ≥220 MPa
Elongation: ≥35%
Hardness: ≤90 HRB |
| Temperature Range | -50°C to 400°C (Continuous Service) |
| Surface Finish | Annealed & Pickled, Electro-Polished (Ra ≤0.8µm), or Passivated per ASTM A967 |
| Applications | Sulfuric acid reactors, pickling tanks, offshore scrubber systems, organic chemical synthesis |
3. Advantages of Importing Our Product
- Superior Acid Resistance: 904L alloy outperforms 316L in sulfuric acid (up to 50% concentration) and chloride environments.
- Cost Efficiency: 35% lower pricing than European mills, leveraging Jiangsu’s advanced VOD (Vacuum Oxygen Decarburization) refining.
- Fast Turnaround: 10,000-ton annual capacity; 14-day lead time for ASTM B677-certified orders from Ningbo or Houston hubs.
- Full Compliance: PMI testing, IGC (Intergranular Corrosion) reports, and NACE MR0175 certification for sour service.
- Custom Fabrication: Orbital welding, flanged ends, and PTFE-lined options for corrosive media handling.
4. Key Applications
- Chemical Reactors: Lining and process piping for sulfuric, acetic, and phosphoric acid production.
- Pharmaceuticals: Handling aggressive solvents (e.g., HCl, HNO3) in API synthesis and purification.
- Oil & Gas: Offshore seawater injection systems, sour gas processing, and amine contactor columns.
- Waste Treatment: Scrubber ducts for flue gas desulfurization (FGD) and hazardous effluent neutralization.
Jiangsu China Steel Union Industrial Co., Ltd delivers ASTM B677-certified 904L super austenitic pipes that redefine reliability in corrosive industrial applications, offering unmatched durability and compliance for global chemical, petrochemical, and energy sectors.
Q1. What are your company's main products ?
A1: Our main products are stainless steel, carbon steel, galvanized steel, aluminium steel, ppgi steel products, including sheets, pipes, coils, strips, bars and channels.
Q2. What are the advantages of your company ?
A2: We guarantee that the quantity and specification of products are in full compliance with the standards of customer orders. We support any kinds of test. In addition, We also have more professional service and competitive price.
Q3. How do you control quality ?
A3: We provide Factory Test Report, also support Third Party Inspection.
Q4. How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from Middle East, Russia, United States, Canada, Italy, Germany, Australia, Egypt, Chile, Mexico, Venezuela, Argentina, Kuwait, Saudi Arabia, UAE, Sri Lanka, Indonesia, Bangladesh, Turkey, India, etc.
Q5. Can you provide sample ? Do you support OEM ?
A5: Yes. Small samples in store can be provided for free. Customized samples will take about 2-3days.
Q6: What's your payment terms ?
A6: By T/T, L/C (30% deposit in advance, balance 70% before shipment), Western Union, Paypal, or Trade Online.
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904L Austenitic Stainless Steel Pipes 2 Inch ASTM B677 Acid Proof For Chemical Reactors Images
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