SS 904L Pipe Fittings Manufacturer | ASTM A403 WP904L Fittings Supplier
Stainless Steel 904L fittings made from the material of grade 904L austenitic stainless steel is mainly utilized in the severe corrosive environments in which most standard stainless steels are insufficient. Due to its’ great resistance of against of phosphoric acid, chlorides, sulfuric acid, and seawater, SS 904L fittings are very common in many industrial applications. Our products are often applied to petrochemical, chemical industry, oil and gas sector, petroleum refinery, pharmaceutical industry, pulp and paper industry, marine, and power plants.
We manufacture, exporter, supplier the highest quality 904L stainless steel pipe fittings which conform to the worldwide standards and regulations. All of our 904L stainless steel fittings are fabricated by high quality raw materials and processed with exact controls which will provide durable performance, long life, dimensional stability and reliability. We cover all major types of 904L stainless steel fittings including but not limit to: Elbows, Tees, Reducers, Caps, Stub Ends, Couplings, Unions and Instrumentation Fittings.
What are Stainless Steel 904L Fittings?
Stainless Steel 904L Fittings are high-alloy austenitic stainless steel pipe fittings containing elevated levels of nickel, chromium, molybdenum, and copper. These fittings offer exceptional resistance to corrosion, pitting, crevice corrosion, and stress corrosion cracking, making them suitable for aggressive chemical processing, offshore, and marine applications. Common types include elbows, tees, reducers, caps, couplings, and threaded fittings manufactured according to ASTM A403 WP904L specifications.
Why Choose 904L Stainless Steel Pipe Fittings?
Compared to standard stainless steel grades such as 304 and 316, 904L provides significantly enhanced corrosion resistance in acidic and chloride-rich environments.
Key Benefits:
- Outstanding resistance to sulfuric and phosphoric acids
- Superior resistance to pitting and crevice corrosion
- Excellent weldability and fabrication characteristics
- High strength and toughness at elevated temperatures
- Strong resistance to chloride stress corrosion cracking
- Long service life with reduced maintenance requirements
- Suitable for seawater and offshore applications
- Excellent performance in chemical processing industries
These advantages make 904L Pipe Fittings a preferred choice for critical piping systems where reliability and corrosion resistance are essential.
Types of 904L Stainless Steel Pipe Fittings
Our product range includes a complete selection of 904L Stainless Steel Pipe Fittings for industrial piping systems.
904L Stainless Steel Elbow
The 904L Stainless Steel Elbow is used to change flow direction within a piping system. Available in 45°, 90°, and 180° configurations, these fittings provide excellent corrosion resistance and long-term reliability.
Common Variants:
- Long Radius Elbow
- Short Radius Elbow
- 45 Degree Elbow
- 90 Degree Elbow
- 180 Degree Return Bend
ASTM A403 904L Tee Fittings
ASTM A403 904L Tee Fittings are designed to branch pipelines into multiple directions. They are extensively used in chemical plants, refineries, and process industries.
Types:
- Equal Tee
- Reducing Tee
- Barred Tee
904L Reducers
Reducers help connect pipes of different diameters while maintaining efficient flow characteristics.
Available Types:
- Concentric Reducer
- Eccentric Reducer
904L Caps and Stub Ends
Caps are used to terminate pipeline ends, while stub ends are commonly utilized with lap joint flanges for easy maintenance and assembly.
Threaded 904L Fittings Class 150
For low-pressure piping systems, we supply Threaded 904L Fittings Class 150 manufactured with precision threads for leak-free installation.
Available Products:
- Threaded Elbows
- Threaded Tees
- Threaded Couplings
- Threaded Unions
- Threaded Caps
Properties 904L Stainless Steel Fittings
The properties of stainless steel 904L fittings make them stand out among other stainless steel grades. Key properties include:
- Corrosion Resistance: 904L fittings exhibit excellent resistance to a wide range of corrosive environments, including sulfuric acid, phosphoric acid, and other strong acids. This makes them ideal for use in chemical processing plants where aggressive chemicals are present.
- High Durability and Strength: Despite their superior corrosion resistance, 904L grade stainless steel fittings maintain high tensile strength and toughness, even at elevated temperatures. This makes them suitable for applications where both corrosion resistance and strength are critical.
- Excellent Weldability and Formability: These fittings are highly weldable using most standard welding processes, making them easy to fabricate and install in complex piping systems. They also offer excellent formability, which means they can be easily molded into various shapes without compromising their integrity.
- Resistance to Stress Corrosion Cracking: Thanks to their high nickel content, 904L stainless steel fittings have a low susceptibility to stress corrosion cracking, a common issue in other stainless steel grades when exposed to chloride environments.
- Low Carbon Content: The low carbon content in 904L fittings reduces the risk of carbide precipitation during welding, which otherwise can lead to intergranular corrosion.
- Non-Magnetic Nature: In the annealed condition, 904L stainless steel fittings are non-magnetic, which can be beneficial in applications where non-magnetic materials are required.
Advantages of 904L Stainless Steel Fittings
904L stainless steel fittings offer numerous advantages, making them the preferred choice for critical applications:
- Superior Corrosion Resistance: The alloy’s high chromium and molybdenum content ensures superior resistance to both pitting and crevice corrosion in chloride environments. This makes them highly suitable for use in seawater and other aggressive environments.
- Long Service Life: Due to their resistance to various forms of corrosion, stainless steel 904L fittings provide a longer service life compared to other stainless steel grades, reducing maintenance costs and downtime.
- Versatility in Applications: These fittings are used in various applications, including chemical processing, oil and gas refining, pollution control equipment, and marine environments, showcasing their versatility.
- Ease of Fabrication and Installation: The excellent formability and weldability of stainless steel fittings make them easy to manufacture and install, ensuring seamless integration into existing systems.
- Cost-Effective in the Long Run: While the initial investment in 904L fittings might be higher than other materials, their durability and low maintenance needs make them a cost-effective solution over time.
Schedule and Size Chart
| Nominal Pipe Size (NPS) | Schedule | Wall Thickness (inches) | Outside Diameter (OD) (inches) |
| 1/8″ | SCH 10 | 0.049 | 0.405 |
| 1/4″ | SCH 40 | 0.088 | 0.540 |
| 1/2″ | SCH 80 | 0.147 | 0.840 |
| 3/4″ | SCH 40 | 0.113 | 1.050 |
| 1″ | SCH 80 | 0.179 | 1.315 |
| 1-1/2″ | SCH 40 | 0.145 | 1.900 |
| 2″ | SCH 40 | 0.154 | 2.375 |
| 4″ | SCH 80 | 0.337 | 4.500 |
| 6″ | SCH 40 | 0.280 | 6.625 |
| 8″ | SCH 80 | 0.500 | 8.625 |
| 10″ | SCH 40 | 0.365 | 10.750 |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength (MPa) | 490 – 680 |
| Yield Strength 0.2% Proof (MPa) | 220 |
| Elongation (%) | 35 |
| Hardness (Brinell) | 170 max |
| Modulus of Elasticity (GPa) | 195 |
| Impact Toughness (J) | > 100 |
Specifications Chart
| Standard | Specification |
| ASTM | A403 (Pipe Fittings), B366 (Wrought Fittings) |
| ASME | B16.9, B16.11, B16.28 |
| EN | 10253-4 |
| DIN | 1.4539 |
| UNS | N08904 |
| ISO | 15510 |
Chemical Composition Chart
| Element | Composition (%) |
| Carbon (C) | 0.020 max |
| Chromium (Cr) | 19.0 – 23.0 |
| Nickel (Ni) | 23.0 – 28.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.035 max |
| Iron (Fe) | Balance |
Physical Properties Chart
| Property | Value |
| Density (g/cm³) | 8.0 |
| Melting Point (°C) | 1350 – 1390 |
| Thermal Conductivity (W/m·K) | 12.0 at 20°C |
| Electrical Resistivity (µΩ·m) | 94 at 20°C |
| Specific Heat (J/kg·K) | 450 |
| Coefficient of Expansion (µm/m·K) | 15.8 (20 – 100°C) |
904L Stainless Steel Instrumentation Fittings Exporter
We are recognized as a reliable 904L Stainless Steel Instrumentation Fittings Exporter serving industries requiring precise flow control and leak-proof connections.
Instrumentation Fittings Include:
- Tube Fittings
- Compression Fittings
- Male Connectors
- Female Connectors
- Ferrule Fittings
- Bulkhead Connectors
- Needle Valve Connections
These fittings are widely used in instrumentation systems, hydraulic lines, process control systems, and analytical equipment.
Applications of ASTM A403 WP904L Fittings
The exceptional corrosion resistance of ASTM A403 WP904L Fittings makes them suitable for various demanding industries.
Chemical Processing Plants
Used for handling aggressive acids, solvents, and corrosive chemicals.
Oil & Gas Industry
Applied in offshore platforms, subsea pipelines, and refinery processing units.
Petrochemical Plants
Ideal for high-temperature and corrosive process environments.
Marine and Seawater Systems
Excellent resistance to chloride attack makes them suitable for marine applications.
Pharmaceutical Industry
Used in hygienic processing systems requiring corrosion-resistant materials.
Pulp & Paper Industry
Performs efficiently in bleaching and chemical treatment processes.
Power Generation
Used in heat exchangers, condensers, and high-performance piping systems.
Other grades in SS fittings :
Why Buy 904L Pipe Fittings From Us?
When selecting a supplier for critical piping components, quality, traceability, and technical expertise are essential.
Reasons customers choose us:
- Extensive inventory availability
- Competitive pricing
- International quality standards
- Fast global shipping
- Customized dimensions and specifications
- Complete material traceability
- Third-party inspection support
- Technical assistance and project support
Our team works closely with customers to provide reliable piping solutions for even the most demanding industrial applications.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Stainless Steel 904L Fittings. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
