Stainless Steel 904L Pipe Manufacturer in India
Stainless Steel 904L Pipe Manufacturer in India
Sachiya Steel International is an ISO 9001:2015 and TÜV-certified Stainless Steel 904L Pipe Manufacturer in India, established in 2005. Our Vasai manufacturing facility produces seamless and welded pipes in SS 904L (UNS N08904 / EN 1.4539), known for its excellent resistance to many acids and aggressive industrial environments. With a strong focus on quality and manufacturing standards, we serve industries that require reliable piping solutions for demanding operating conditions.
Our product range includes different sizes, schedules, and finishes to meet various industrial needs. We supply pipes with relevant material test certificates and serve customers across 85+ countries. Our products support applications in chemical processing, fertiliser production, pulp and paper, desalination, and offshore industries. Backed by industry experience, certified quality systems, and a commitment to dependable service, Sachiya Steel International continues to provide stainless steel piping solutions for diverse industrial requirements.
What Is Stainless Steel 904L Pipe?
Stainless Steel 904L Pipe is made from low-carbon, high-alloy austenitic stainless steel (UNS N08904). It contains approximately 20% chromium, 25% nickel, 4–5% molybdenum, and 1–2% copper. This composition provides strong resistance to many acids, chlorides, and aggressive chemical environments. Compared with 316L stainless steel, 904L offers better resistance to certain corrosive conditions, making it suitable for chemical processing, fertiliser plants, and other demanding industrial applications.
Stainless Steel 904L Pipes
High-quality Stainless Steel 904L Pipes manufactured for demanding applications across chemical processing, petrochemical, pharmaceutical, marine, oil and gas and engineering industries. Available in seamless, ERW and EFW forms with various sizes, wall thicknesses and manufacturing specifications.
Why Choose Stainless Steel 904L Pipe?
Stainless Steel 904L Pipe offers excellent corrosion resistance, good strength, and reliable performance in demanding industrial environments. Its high nickel, chromium, molybdenum, and copper content helps it withstand many acidic and chloride-rich conditions where standard stainless steel grades may not perform as well.
- High Corrosion Resistance: Handles many aggressive acids and corrosive chemicals.
- Resistance to Pitting: Molybdenum helps protect the pipe against localised corrosion in chloride-containing environments.
- Good Acid Resistance: Copper improves resistance to certain reducing acids, including sulphuric acid.
- Durable Performance: Supports long-term use in suitable industrial operating conditions.
- Wide Industrial Applications: Used in chemical plants, fertiliser units, pulp and paper mills, and desalination systems.
- Low-Carbon Composition: Helps reduce the risk of sensitisation during welding when proper fabrication practices are followed.
Stainless Steel 904L Pipe is a practical choice for applications that demand reliable corrosion resistance and consistent performance. Selecting the correct size, pressure rating, and material specification helps ensure safe and efficient operation.
Types of Stainless Steel 904L Pipe
A reliable Stainless Steel 904L Pipe manufacturer offers different pipe types to meet industrial requirements for corrosion resistance, pressure, dimensions, and fabrication. Each type serves specific applications based on its design and manufacturing process.
- Seamless Pipes: Made without a welded seam, these pipes suit critical process lines and applications that require reliable performance under pressure.
- ERW Pipes: Manufactured by forming and welding steel strips, these pipes are suitable for various industrial applications involving corrosive fluids.
- TIG Welded Pipes: Produced using TIG welding, these pipes offer controlled weld quality for applications with specific fabrication requirements.
- EFW Large-Diameter Pipes: Made using electric fusion welding, these pipes suit projects requiring larger diameters and specified wall thicknesses.
- Heavy Wall Pipes: Available in thicker wall configurations to meet specific pressure and design requirements.
- Cut-Length and Bent Pipes: Supplied in required lengths or formed to specified shapes and drawings to suit installation needs.
The right pipe type depends on operating conditions, dimensions, and application requirements. Choosing the appropriate option helps support reliable performance and long-term service.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
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Aluminium Pipes
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Carbon Steel Seamless Pipes
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Carbon Steel Pipe
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Stainless Steel Pipe
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Alloy Steel Pipe
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Duplex Steel Pipe
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Super Duplex Steel Pipe
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Nickel Alloy Pipe
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Copper Nickel Alloy Pipe
→Get Certified Stainless Steel 904L Pipe at Competitive Factory Prices
Stainless Steel 904L Pipe Specifications
| Parameter | Details |
|---|---|
| Material | Stainless Steel 904L / UNS N08904 / 1.4539 |
| Product forms | Seamless, ERW, TIG welded, EFW |
| Pipe size | ⅛" NPS to 24" NPS |
| Wall thickness | 1.65 mm to 25 mm |
| Schedules | 5S, 10S, 40S, 80S, 160, XXS and custom |
| Heat treatment | Solution annealed |
| Length | Single random, double random, cut length up to 12 m |
| Ends | Plain, beveled, threaded |
| Surface | Annealed and pickled |
| Tests | Chemical analysis, tensile, flattening, hydrotest or eddy current, PMI |
| Extra tests on request | IGC, pitting test to ASTM G48, ultrasonic, radiography |
| Documents | EN 10204 3.1 mill certificate, inspection reports |
Stainless Steel 904L Pipe Standards
| Standard | What it covers |
|---|---|
| ASTM A312 / ASME SA312 | Seamless and welded austenitic pipe, including N08904 |
| ASTM B677 / ASME SB677 | Seamless pipe and tube in UNS N08904 |
| ASTM B673 / ASME SB673 | Welded pipe in UNS N08904 |
| ASME B36.19M | Stainless pipe dimensions and schedules |
| ASME B36.10M | Welded and seamless steel pipe dimensions |
| EN 10216-5 | European seamless stainless tubes, including 1.4539 |
| EN 10217-7 | European welded stainless tubes, including 1.4539 |
| JIS G3459 | Japanese stainless steel pipes |
Stainless Steel 904L vs 316L vs Duplex 2205 Pipe: Which One Do You Need?
| Point | 904L | 316L | Duplex 2205 |
|---|---|---|---|
| Nickel | 23–28% | 10–14% | 4.5–6.5% |
| Molybdenum | 4.0–5.0% | 2.0–3.0% | 3.0–3.5% |
| Pitting resistance (PREN) | About 35 | About 24 | About 35 |
| Sulphuric acid resistance | Very good | Poor | Fair |
| Strength | Moderate | Moderate | High |
| Chloride stress cracking | Resistant | Susceptible | Resistant |
| Cost | Higher than 316L | Lowest | Similar to 904L |
Pick 904L when sulphuric or phosphoric acid is part of the process. Pick duplex 2205 when strength and chloride resistance matter most, and the fluid is not a strong acid. Pick 316L when the fluid is mild and cost is the priority.
Stainless Steel 904L Pipe Chemical Composition
| Element | ASTM N08904 (%) | EN 1.4539 (%) |
|---|---|---|
| Carbon (C) | 0.020 max | 0.020 max |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Silicon (Si) | 1.00 max | 0.70 max |
| Phosphorus (P) | 0.040 max | 0.030 max |
| Sulphur (S) | 0.030 max | 0.010 max |
| Chromium (Cr) | 19.0 – 23.0 | 19.0 – 21.0 |
| Nickel (Ni) | 23.0 – 28.0 | 24.0 – 26.0 |
| Molybdenum (Mo) | 4.0 – 5.0 | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 | 1.2 – 2.0 |
| Nitrogen (N) | — | 0.15 max |
| Iron (Fe) | Balance | Balance |
Stainless Steel 904L Pipe Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength | 490 MPa min |
| Yield strength (0.2%) | 215 MPa min |
| Elongation | 35% min |
| Hardness | 90 HRB max |
| Density | 8.0 g/cm³ |
| Melting range | About 1300 – 1390°C |
| Elastic modulus | About 190 GPa |
| Magnetic response | Non-magnetic |
Corrosion Resistance of Stainless Steel 904L Pipe
This table is a general guide. Results depend on concentration, temperature and impurities, so send us your operating conditions and we will advise on suitability.
| Environment | How 904L performs |
|---|---|
| Sulphuric acid | Very good at low to high strength at moderate temperature; limited in the mid-range as heat rises |
| Phosphoric acid | Excellent, including contaminated process acid |
| Acetic and formic acid | Excellent |
| Nitric acid | Good |
| Seawater and brine | Very good; resists pitting and crevice attack |
| Chloride stress corrosion | Highly resistant |
| Caustic soda | Good |
| Hydrochloric acid | Limited to dilute, cool conditions |
Stainless Steel 904L Pipe Size and Weight Chart
Theoretical weight is (OD − Wall) × Wall × 0.02513, giving kg per metre with dimensions in mm. The factor reflects a density of 8.0 g/cm³. Real weight varies slightly within mill tolerance.
OD and wall are in mm. Multiply the result by the pipe length to obtain the total weight.
| NPS | OD (mm) | Sch 10S wall (mm) | Sch 10S kg/m | Sch 40S wall (mm) | Sch 40S kg/m |
|---|---|---|---|---|---|
| ½" | 21.3 | 2.11 | 1.02 | 2.77 | 1.29 |
| 1" | 33.4 | 2.77 | 2.13 | 3.38 | 2.55 |
| 1½" | 48.3 | 2.77 | 3.17 | 3.68 | 4.13 |
| 2" | 60.3 | 2.77 | 4.00 | 3.91 | 5.54 |
| 3" | 88.9 | 3.05 | 6.58 | 5.49 | 11.51 |
| 4" | 114.3 | 3.05 | 8.53 | 6.02 | 16.38 |
| 6" | 168.3 | 3.40 | 14.09 | 7.11 | 28.80 |
| 8" | 219.1 | 3.76 | 20.35 | 8.18 | 43.36 |
| 10" | 273.1 | 4.19 | 28.32 | 9.27 | 61.46 |
| 12" | 323.9 | 4.57 | 36.67 | 9.53 | 75.29 |
Stainless Steel 904L Pipe Sizes, Dimensions and Schedules
A pipe is named by its nominal size, but its wall depends on the schedule. Lighter schedules save weight and cost where pressure is low. Heavier schedules handle pressure and give extra wall for corrosion allowance, which is common on acid lines. DN is the metric size for each NPS.
| Schedule | Wall at 2" / DN 50 (mm) | Wall at 6" / DN 150 (mm) | Typical use |
|---|---|---|---|
| 5S | 1.65 | 2.77 | Low-pressure, light-duty lines |
| 10S | 2.77 | 3.40 | General corrosive service |
| 40S | 3.91 | 7.11 | Standard process piping |
| 80S | 5.54 | 10.97 | Higher pressure and corrosion allowance |
| 160 | 8.74 | 18.26 | Very high pressure |
Typical outside diameter tolerance for ASTM A312 pipe is below.
| Pipe size (NPS) | OD tolerance (mm) |
|---|---|
| ⅛" to 1½" | +0.4 / −0.8 |
| Over 1½" to 4" | +0.8 / −0.8 |
| Over 4" to 8" | +1.6 / −0.8 |
| Over 8" to 18" | +2.4 / −0.8 |
Wall thickness tolerance is −12.5% on A312 pipe. We also cut, bend and prepare ends to your drawing.
Testing and Inspection of Stainless Steel 904L Pipe
| Test | Purpose |
|---|---|
| Chemical analysis | Confirms chromium, nickel, molybdenum, copper and carbon limits |
| Tensile and hardness | Checks strength, elongation and hardness |
| Flattening | Shows the pipe deforms without cracking |
| Hydrostatic or eddy current | Finds leaks and hidden defects |
| PMI | Confirms molybdenum, copper and nickel before dispatch |
| IGC test | Checks resistance to intergranular attack, on request |
| Pitting test to ASTM G48 | Measures pitting resistance, on request |
| Ultrasonic or radiography | Extra checks for welded and heavy-wall pipe, on request |
| Dimensional and visual | Checks OD, wall, length, straightness and surface |
Common Materials Supplied with Stainless Steel 904L Pipe
Different industrial applications require materials with specific levels of corrosion resistance, strength, and chemical compatibility. Stainless Steel 904L Pipe suppliers can provide a range of grades and alloys to suit varying operating conditions.
316L and 317L: Suitable for applications involving moderate corrosion and less aggressive process conditions.
Duplex 2205: Offers higher strength and good resistance to chloride-related corrosion in suitable environments.
Super Duplex 2507: Designed for demanding applications involving seawater and high chloride levels.
6Mo (S31254): Provides strong resistance to pitting and crevice corrosion in aggressive chloride environments.
Alloy 825: A nickel-iron-chromium alloy used in applications involving sulphuric acid, phosphoric acid, and other corrosive chemicals.
Alloy 625 and C276: Nickel-based alloys suited to demanding chemical processing environments with severe corrosion challenges.
The right material depends on the chemical composition of the fluid, operating temperature, and service conditions. Selecting a suitable grade helps maintain equipment reliability and long-term performance.
Applications of Stainless Steel 904L Pipe
- Chemical Processing: Sulphuric acid, phosphoric acid and organic acid transfer lines.
- Fertiliser Plants: Phosphoric acid and wet-process acid piping.
- Oil and Gas: Offshore topside and seawater lines, and process lines with chloride and acid gases.
- Desalination and Seawater: Brine, seawater cooling and intake lines.
- Pulp and Paper: Bleach plant and chemical recovery piping.
- Power Generation: Flue gas desulphurisation (FGD) scrubber and cooling lines.
- Pharmaceutical and Fine Chemicals: Process lines handling aggressive reagents and acids.
- Marine and Shipbuilding: Scrubber, exhaust cleaning and seawater systems.
Why Choose Us as Your Stainless Steel 904L Pipe Manufacturer in India?
Choosing the right Stainless Steel 904L Pipe Manufacturer in India means finding a reliable source for quality, consistency, and technical support. With experience dating back to 2005, we operate under ISO 9001:2015 and TÜV certifications, focusing on manufacturing standards and dependable supply for industrial applications.
Certified Quality: We follow established quality procedures and provide material documentation to support product traceability and inspection requirements.
Material Verification: Chemical composition checks and Positive Material Identification (PMI) can help verify the required alloy grade. Test results and certificates are provided according to the agreed specifications.
Multiple Pipe Options: Our range includes seamless and welded pipes in different sizes, schedules, and specifications to meet project requirements.
Custom Manufacturing: We can supply specified cut lengths and fabricated shapes based on approved drawings and technical requirements.
Inspection Support: EN 10204 3.1 material test certificates are available, with additional testing and third-party inspection arranged as agreed.
Global Supply Network: With exports to more than 85 countries, we understand the documentation and coordination required for international shipments.
Our focus remains on supplying Stainless Steel 904L Pipes that meet the required specifications, with quality documentation and support throughout the supply process.
Countries We Export Stainless Steel 904L Pipe To
As a Stainless Steel 904L Pipe Manufacturer and Supplier in India, we export to 85+ countries, serving chemical, fertiliser, pulp and paper, desalination and oil and gas industries.
Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.
Europe: Germany, Italy, United Kingdom, Netherlands, France, Spain, Belgium and Poland.
Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan and Australia.
Americas: USA, Canada, Mexico, Brazil and Chile.
Africa: South Africa, Nigeria, Egypt and Kenya.
South Asia: Nepal, Bangladesh and Sri Lanka.
EN 10204 3.1 mill test certificates come with every order. EN 10204 3.2 certification and third-party inspection can be arranged on request. We pack each shipment to suit its route and destination, and we prepare the shipping and export documents your project requires, so international orders move cleanly from our plant to your site.
FAQs
Common questions about SS 904L pipe, acid resistance, welding, standards and supply.
Is 904L better than 316L?
For acids and chlorides, yes. 904L resists sulphuric and phosphoric acid and pitting far better than 316L. For mild fluids, 316L is cheaper and enough.
How does 904L compare with duplex 2205?
They have similar pitting resistance. 904L is stronger against sulphuric and phosphoric acid, while duplex 2205 has higher strength.
Does 904L need heat treatment after welding?
Normally no. The very low carbon keeps welds corrosion resistant, but the weld should use a matching or over-alloyed filler such as ER385.
What is the maximum working temperature?
904L is generally used below about 450°C. Above that, the structure can change and lose toughness.
Which standard should I specify for 904L pipe?
Use ASTM A312 for general pipe. Use B677 for seamless and B673 for welded pipe in UNS N08904.
How do I calculate the weight of 904L pipe?
Use (OD − Wall) × Wall × 0.02513, with both values in mm, to get kg per metre. Multiply by length for total weight.
Which documents come with an order?
EN 10204 3.1 mill test certificates are included. Inspection reports, PMI reports and third-party certificates are available on request.
How is 904L pipe packed for export?
Pipes are capped, bundled and wrapped in waterproof sheeting, then strapped or crated. Heat numbers are marked on each bundle for traceability.