Girgaon, Mumbai - 400004
Stainless Steel 904L Seamless Pipes are high-alloy austenitic stainless steel pipes developed for demanding corrosive environments where enhanced resistance to acids, chlorides and localized corrosion is required. The grade contains high levels of chromium, nickel, molybdenum and copper, providing excellent corrosion resistance in a wide range of aggressive process conditions.
Manufactured without a longitudinal weld seam, Stainless Steel 904L Seamless Pipes provide uniform construction for demanding pressure and process piping systems. Their high nickel and molybdenum content contributes to resistance against pitting and crevice corrosion, while the low carbon content helps reduce the risk of sensitization during welding and thermal exposure.
Stainless Steel 904L Seamless Pipes are used in chemical processing plants, pharmaceutical equipment, petrochemical facilities, pollution control systems, heat exchangers, marine applications and other industries where high corrosion resistance is important. They are available in different outside diameters, wall thicknesses, schedules, and lengths according to applicable standards and project requirements.
Kamal Steels is a Stainless Steel 904L Seamless Pipes Manufacturer & Stockist in India, supplying SS 904L Seamless Pipes in standard and customized sizes, schedules, wall thicknesses and lengths. Products can be supplied with applicable testing, inspection, material certificates and documentation according to customer and project specifications.
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 904L Seamless Pipe |
| Grade | SS 904L / UNS N08904 |
| UNS | N08904 |
| EN Grade | 1.4539 |
| Material Type | Super Austenitic Stainless Steel |
| Manufacturing Process | Seamless |
| Product Standard | ASTM A312 |
| ASME Specification | ASME SA312 |
| Size Range | 1/8" NB to 24" NB and above as required |
| Schedule | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS |
| Wall Thickness | As per ASME B36.19M or customer specification |
| Length | Single Random Length, Double Random Length and Fixed Length |
| End Type | Plain End, Bevelled End and Threaded End |
| Surface Finish | Pickled & Passivated, Annealed, Bright Annealed and Polished |
| Heat Treatment | Solution Annealing followed by Rapid Cooling |
| Testing | Hydrostatic Test, PMI Test, Ultrasonic Test, Flattening Test and Flaring Test |
| Inspection | Third Party Inspection Available as per project requirement |
| Certification | EN 10204 3.1 Material Test Certificate (MTC) |
| Packaging | Bundles, Wooden Cases, Wooden Boxes, Plastic End Caps and Export Packing |
| NPS / Size | Outside Diameter (OD) | Common Use |
|---|---|---|
| 1/8" | 10.3 mm | Instrumentation and small bore piping |
| 1/4" | 13.7 mm | Utility and process lines |
| 1/2" | 21.3 mm | Chemical and industrial piping |
| 3/4" | 26.7 mm | Process equipment connections |
| 1" | 33.4 mm | Fluid transfer systems |
| 1 1/4" | 42.2 mm | Industrial process piping |
| 1 1/2" | 48.3 mm | Chemical processing applications |
| 2" | 60.3 mm | Pressure and process piping |
| 3" | 88.9 mm | Industrial plant piping |
| 4" | 114.3 mm | Refinery and chemical systems |
| 6" | 168.3 mm | Large process piping systems |
SS 904L Seamless Pipes are manufactured according to international dimensional standards including ASME B36.19M. Available dimensions may vary according to pipe schedule, pressure requirements, application conditions, and customer specifications.
The weight of Stainless Steel 904L Seamless Pipes depends on outside diameter, wall thickness, nominal pipe size and schedule. Heavy wall schedules provide increased pressure handling capability but result in higher weight per metre compared with light wall pipes.
| NPS / Size | SCH 10 Weight (kg/m) | SCH 40 Weight (kg/m) | SCH 80 Weight (kg/m) |
|---|---|---|---|
| 1/2" | 0.63 | 0.84 | 1.10 |
| 3/4" | 0.80 | 1.12 | 1.48 |
| 1" | 1.01 | 1.40 | 1.81 |
| 1 1/4" | 1.28 | 1.79 | 2.35 |
| 1 1/2" | 1.45 | 2.16 | 2.86 |
| 2" | 1.92 | 2.99 | 3.93 |
| 3" | 3.05 | 4.70 | 6.39 |
| 4" | 4.38 | 6.47 | 8.63 |
| 6" | 7.31 | 10.75 | 14.32 |
The above SS 904L Seamless Pipe weights are approximate theoretical values. Actual supplied weight can vary depending on manufacturing tolerances, dimensional standards, wall thickness variation and production conditions.
Stainless Steel 904L Seamless Pipe schedules define the wall thickness and pressure carrying capability of the pipe. Selection of the correct schedule depends on operating pressure, temperature, fluid characteristics and applicable piping design standards. SS 904L pipes are available in various schedules including light wall, standard wall and heavy wall options for critical industrial applications.
| Schedule | Wall Type | Typical Use |
|---|---|---|
| SCH 5S | Light Wall | Low-pressure chemical and utility applications |
| SCH 10S | Light Wall | General process piping and corrosion-resistant services |
| SCH 40S | Medium Wall | Industrial process lines and plant piping systems |
| SCH 80S | Heavy Wall | Higher pressure applications and demanding services |
| SCH 160 | Extra Heavy Wall | High-pressure and critical process applications |
| XXS | Double Extra Heavy Wall | Extreme pressure and severe service applications |
SS 904L Seamless Pipe schedule availability may vary depending on pipe size, manufacturing standards and project requirements. Kamal Steels supplies SS 904L Pipes as per ASTM, ASME and customer-specific requirements.
ASTM A312 TP904L Seamless Pipe is a super austenitic stainless steel pipe specification designed for applications requiring outstanding corrosion resistance and long-term reliability. TP904L contains higher amounts of nickel, chromium, molybdenum and copper, which provide excellent resistance against sulfuric acid, phosphoric acid, chloride environments and various aggressive chemicals.
ASTM A312 TP904L Seamless Pipes are manufactured using a seamless process and are solution annealed to improve corrosion resistance, mechanical properties and structural stability. These pipes are widely used in chemical processing plants, pharmaceutical industries, offshore applications, refineries, marine systems, heat exchangers and pollution control equipment.
Kamal Steels supplies ASTM A312 TP904L Seamless Pipes in different sizes, schedules, wall thicknesses, lengths and surface finishes. Each pipe can be supplied with Material Test Certificates, third-party inspection and export-quality packaging as per customer requirements.
Stainless Steel 904L and Stainless Steel 316L are both corrosion-resistant austenitic stainless steel grades used for industrial piping applications. However, SS 904L is a higher alloy material containing increased nickel, chromium, molybdenum and copper content, which provides superior resistance against aggressive chemicals, acids and chloride environments compared with SS 316L.
SS 316L is widely selected for general chemical processing, food, pharmaceutical and marine applications, while SS 904L is preferred for highly corrosive environments such as sulfuric acid processing, offshore plants and specialized chemical industries where extended service life is required.
| Feature | SS 904L | SS 316L |
|---|---|---|
| Material Type | Super Austenitic Stainless Steel | Austenitic Stainless Steel |
| Corrosion Resistance | Excellent resistance against aggressive acids and chlorides | Good corrosion resistance for general applications |
| Nickel Content | Higher nickel content (23–28%) | Typically 10–14% |
| Molybdenum Content | Higher molybdenum content for improved pitting resistance | Approximately 2–3% |
| Copper Addition | Contains copper for improved acid resistance | No significant copper addition |
| Chloride Resistance | Superior resistance in chloride environments | Good chloride resistance |
| Cost | Higher due to alloy content | Generally more economical |
| Typical Applications | Chemical plants, acid processing, offshore and severe corrosion applications | Food, pharmaceutical, marine and general process industries |
The selection between SS 904L and SS 316L depends on operating conditions, corrosion environment, temperature, pressure and project requirements. SS 904L is selected when higher corrosion resistance and longer service performance are required.
The main difference between Stainless Steel 904L Seamless Pipe and Welded Pipe is the manufacturing process. Seamless pipes are produced from solid billets without any longitudinal welding joint, whereas welded pipes are manufactured by forming stainless steel plates or strips and joining the edges through welding.
SS 904L Seamless Pipes are generally preferred for critical applications involving high pressure, high temperature and severe corrosion conditions. Welded pipes can be suitable for large diameter applications and systems where welding standards and inspection requirements are acceptable.
| Feature | SS 904L Seamless Pipe | SS 904L Welded Pipe |
|---|---|---|
| Manufacturing Process | Manufactured from solid billet without welding seam | Manufactured by forming and welding stainless steel strip |
| Weld Seam | No longitudinal weld seam | Contains welded joint |
| Strength | Uniform structure and high pressure capability | Depends on weld quality and inspection |
| Pressure Service | Suitable for demanding pressure applications | Used where permitted by design specifications |
| Surface Finish | Smooth internal and external surface | Weld area may require additional finishing |
| Cost | Generally higher due to manufacturing process | Usually more economical for large quantities |
| Applications | Chemical processing, offshore, pressure piping and critical services | General industrial piping and fabrication applications |
Stainless Steel 904L Seamless Pipes contain high levels of chromium, nickel, molybdenum, and copper. This alloy composition provides excellent resistance to pitting, crevice corrosion, and a wide range of aggressive chemical environments. The low carbon content also helps reduce the risk of sensitization during thermal exposure.
| Element | Composition (%) |
|---|---|
| Carbon | 0.020 max. |
| Chromium | 19.0 - 23.0 |
| Nickel | 23.0 - 28.0 |
| Molybdenum | 4.0 - 5.0 |
| Copper | 1.0 - 2.0 |
| Manganese | 2.00 max. |
| Silicon | 1.00 max. |
| Phosphorus | 0.045 max. |
| Sulfur | 0.035 max. |
The chemical composition of SS 904L Seamless Pipes should be verified against the applicable ASTM or ASME specification and the material test certificate supplied with the product.
Stainless Steel 904L Seamless Pipes provide good tensile strength, yield strength, elongation, and toughness for demanding corrosion-resistant piping applications. The combination of high nickel, chromium, and molybdenum contributes to reliable performance in aggressive process environments.
| Mechanical Property | Minimum Requirement |
|---|---|
| Tensile Strength | 490 MPa |
| Yield Strength | 220 MPa |
| Elongation | 35% |
Actual mechanical properties may vary according to the applicable product specification, pipe dimensions, heat-treatment condition, and testing requirements. Final values should be confirmed against the relevant standard and material test certificate.
Stainless Steel 904L Seamless Pipes are used in applications where high resistance to aggressive chemicals, acids, chlorides, and localized corrosion is required. Their high-alloy composition makes them suitable for demanding process and fluid-handling systems.
| Application | Typical Use |
|---|---|
| Chemical Processing | Corrosive chemical process piping and fluid handling. |
| Pharmaceutical Equipment | Corrosion-resistant process and fluid piping systems. |
| Petrochemical Equipment | Process piping exposed to aggressive process media. |
| Heat Exchangers | Corrosion-resistant heat-transfer systems. |
| Pollution Control Equipment | Equipment exposed to corrosive gases and process fluids. |
| Marine Applications | Piping and equipment exposed to chloride-containing environments. |
| Industrial Process Systems | High-corrosion-resistance piping for demanding service conditions. |
Stainless Steel 904L Seamless Pipes are used across industries that require enhanced corrosion resistance in aggressive chemical and process environments. The high-alloy composition makes Grade 904L suitable for applications where conventional stainless steel grades may not provide sufficient corrosion resistance.
| Industry | Typical Applications |
|---|---|
| Chemical Industry | Corrosive chemical processing and process piping. |
| Petrochemical Industry | Process piping and corrosion-resistant equipment. |
| Pharmaceutical Industry | Process and fluid-handling systems. |
| Oil & Gas Industry | Selected corrosive process and utility applications. |
| Marine Industry | Chloride-exposed piping and equipment. |
| Power Generation Industry | Selected corrosion-resistant process systems. |
| Pollution Control Industry | Flue gas and corrosive process equipment. |
Kamal Steels supplies Stainless Steel 904L Seamless Pipes in different sizes, schedules, wall thicknesses and lengths according to customer and project requirements.
SS 904L Seamless Pipes are high-alloy austenitic stainless steel pipes manufactured without welded joints. They provide exceptional resistance to corrosion, acids, chlorides and pitting.
They are commonly used in chemical processing, oil and gas, marine engineering, desalination plants, pharmaceutical industries and heat exchanger systems.
The UNS designation of Stainless Steel 904L is UNS N08904.
Yes. SS 904L offers higher nickel and molybdenum content, providing significantly better resistance to chlorides, sulfuric acid and pitting corrosion than SS 316L.
We supply SCH 5, SCH 10, SCH 20, SCH 40, SCH 80, SCH 80S, SCH 120, SCH 160 and XXS.
Outside diameters range from 6 mm OD to 914.4 mm OD with sizes up to 24" NB available.
Yes. Every shipment includes Mill Test Certificates (EN 10204 3.1) and complete quality documentation.
Yes. We provide single random, double random and custom cut lengths as per customer specifications.
Yes. Kamal Steels exports Stainless Steel 904L Seamless Pipes worldwide with export-quality packaging and prompt delivery.
We offer premium-quality ASTM A312 SS 904L Seamless Pipes, competitive pricing, ready stock, third-party inspection, fast delivery and dedicated technical support.