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Stainless Steel 904L Pipe Fittings are widely used in industrial piping systems that demand excellent corrosion resistance, reliable mechanical properties, and long-lasting performance in aggressive service environments. Their high-alloy composition, containing chromium, nickel, molybdenum, and copper, helps improve resistance to pitting, crevice corrosion, and many acidic environments, particularly those involving sulfuric acid under suitable conditions. These fittings are commonly used in chemical processing plants, petrochemical facilities, pharmaceutical production, pulp and paper industries, offshore installations, desalination plants, and specialized industrial equipment. Available configurations, including elbows, tees, reducers, caps, and customized fittings, help accommodate different piping layouts, connection types, and project specifications. Stainless Steel 904L is especially valued where conventional stainless steel grades may not provide sufficient resistance to the process environment. With its combination of high corrosion resistance, good weldability, dependable mechanical performance, and durability in suitable chemical service conditions, Stainless Steel 904L Pipe Fittings are a practical choice for demanding applications when the material grade and operating environment are carefully evaluated.
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Stainless Steel 904L Pipe Fittings are manufactured from a high-alloy austenitic stainless steel containing chromium, nickel, molybdenum, and copper, which work together to provide strong corrosion resistance in many challenging industrial environments. The elevated nickel and molybdenum content helps improve resistance to pitting and crevice corrosion, while copper enhances performance in certain reducing acid environments. These properties make Stainless Steel 904L a valuable material for applications where exposure to aggressive chemicals and corrosive process fluids is a major concern. The fittings are available in configurations such as elbows, tees, reducers, caps, and other specialized designs, with dimensions, wall thicknesses, schedules, and connection types selected according to project specifications. Their combination of excellent corrosion resistance, good weldability, dependable mechanical properties, and durability in suitable chemical environments makes Stainless Steel 904L Pipe Fittings suitable for chemical processing plants, petrochemical facilities, pharmaceutical equipment, pulp and paper production, desalination systems, and other industrial piping applications where long-term material reliability is essential.
In the solution-annealed condition, Stainless Steel 904L Pipe Fittings provide a dependable balance of corrosion resistance, toughness, and fabrication flexibility for industrial systems exposed to aggressive chemicals and corrosive process fluids. Their high nickel and molybdenum content, combined with copper and chromium, helps the alloy resist pitting, crevice corrosion, and various acidic environments under suitable operating conditions. These fittings are widely used in chemical-processing plants, pharmaceutical facilities, petrochemical installations, pulp and paper mills, desalination plants, and equipment designed to handle corrosive media. Components such as elbows, tees, reducers, caps, and customized fittings can be selected to match specific piping layouts, connection requirements, and engineering specifications. Stainless Steel 904L is particularly valued in applications where maintaining material integrity and reducing corrosion-related maintenance are important considerations. With its combination of excellent corrosion resistance, good weldability, toughness, and dependable performance in suitable chemical environments, Stainless Steel 904L Pipe Fittings can support demanding industrial operations when the material grade, fabrication procedures, and service conditions are properly evaluated.
In the solution-annealed condition, Stainless Steel 904L Pipe Fittings offer a reliable combination of corrosion resistance, mechanical stability, and fabrication performance for industrial environments where conventional stainless steel grades may not provide sufficient protection. Their carefully balanced composition of chromium, nickel, molybdenum, and copper helps the material withstand many aggressive chemical conditions, including certain acidic environments, while providing resistance to pitting and crevice corrosion. These fittings are commonly used in chemical processing units, fertilizer plants, pharmaceutical facilities, petrochemical installations, desalination systems, and pulp and paper manufacturing equipment. Available options include elbows, tees, reducers, caps, and custom-designed fittings that can be selected according to piping layouts, dimensional requirements, and applicable project specifications. Stainless Steel 904L is particularly suitable for applications where corrosion-related maintenance, equipment durability, and consistent material performance are key concerns. With its combination of strong resistance to many corrosive media, good weldability, dependable toughness, and long service potential, Stainless Steel 904L Pipe Fittings can deliver reliable results when the alloy grade, fabrication practices, and actual operating conditions are carefully matched.
Specification | Stainless Steel 904L Pipe Fittings |
|---|---|
Type | Butt Weld (BW), Seamless (SMLS) and Welded, subject to availability |
Thickness | Sch 5S, 10S, 20S, 40S, 80S, 160 and other specified wall thicknesses |
Dimensional Standards | ASME B16.9, ASME B16.28, MSS SP-43, where applicable |
Fittings Standard | ASTM A403 / ASME SA403 for applicable wrought stainless steel fittings; verify grade and product-form requirements |
ASME B16.9 Fitting Types | 45° Elbow, 90° Elbow, Tee, Reducing Tee, Concentric Reducer, Eccentric Reducer, Cap and other covered fittings |
Connection Type | Butt Weld (BW); threaded, flanged or clamp-end connections when separately specified |
Pressure–Temperature Rating | Based on design code, fitting dimensions, wall thickness, operating temperature and component type |
Schedule | Schedule 5S to heavier wall thicknesses, including 10S, 40S and 80S, subject to availability |
Size | Common butt-weld sizes start around NPS ½; larger sizes depend on fitting type, standard and manufacturer |
Material Grade | Stainless Steel 904L |
UNS Number | N08904 |
Werkstoff Number | 1.4539 |
Key Properties | High corrosion resistance, low carbon content, and additions of nickel, molybdenum and copper |
Applications | Chemical processing, pharmaceutical plants, marine equipment, pulp and paper industries, and industrial process piping |
Inspection and Testing | Material Test Certificate (MTC), chemical analysis, mechanical tests and dimensional inspection as specified |
Surface Finish | Pickled, annealed or other customer-specified finish |
Availability | Standard and custom sizes, schedules and configurations subject to manufacturer and project requirements |
DN (mm) | Sch 10S – 90° Elbow (kg) | Sch 10S – 45° Elbow (kg) | Sch 10S – Equal Tee (kg) | Sch 40S – 90° Elbow (kg) | Sch 40S – 45° Elbow (kg) | Sch 40S – Equal Tee (kg) | Sch 80S – 90° Elbow (kg) | Sch 80S – 45° Elbow (kg) | Sch 80S – Equal Tee (kg) |
|---|---|---|---|---|---|---|---|---|---|
8 | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 | 0.06 | 0.04 | 0.03 | 0.07 |
10 | 0.03 | 0.02 | 0.05 | 0.03 | 0.02 | 0.03 | 0.06 | 0.04 | 0.09 |
15 | 0.06 | 0.03 | 0.09 | 0.08 | 0.04 | 0.10 | 0.10 | 0.05 | 0.14 |
20 | 0.07 | 0.03 | 0.13 | 0.08 | 0.04 | 0.17 | 0.11 | 0.05 | 0.20 |
25 | 0.14 | 0.08 | 0.28 | 0.15 | 0.11 | 0.29 | 0.22 | 0.14 | 0.38 |
32 | 0.23 | 0.11 | 0.49 | 0.26 | 0.17 | 0.59 | 0.40 | 0.23 | 0.68 |
40 | 0.30 | 0.17 | 0.68 | 0.40 | 0.23 | 0.86 | 0.51 | 0.29 | 1.02 |
50 | 0.50 | 0.25 | 0.85 | 0.70 | 0.40 | 1.28 | 0.91 | 0.59 | 1.59 |
65 | 0.85 | 0.48 | 1.41 | 1.40 | 0.77 | 2.19 | 1.81 | 0.99 | 3.13 |
80 | 1.25 | 0.63 | 1.77 | 2.20 | 1.08 | 3.31 | 2.97 | 1.50 | 4.45 |
90 | 1.70 | 0.75 | 2.67 | 2.83 | 1.42 | 4.08 | 4.00 | 2.00 | 5.44 |
100 | 2.10 | 1.08 | 3.46 | 4.47 | 2.09 | 5.27 | 6.18 | 2.81 | 7.71 |
150 | 5.45 | 2.72 | 8.07 | 10.89 | 5.44 | 10.99 | 16.32 | 8.16 | 13.61 |
200 | 10.20 | 5.33 | 15.65 | 21.54 | 10.77 | 20.91 | 33.11 | 16.56 | 28.12 |
250 | 18.15 | 9.75 | 26.46 | 38.56 | 19.27 | 35.38 | 51.71 | 25.86 | 49.90 |
300 | 25.80 | 13.62 | 39.46 | 59.42 | 29.71 | 62.14 | 79.38 | 39.69 | 83.91 |
Element of Stainless Steel 904L Pipe Fittings | Content (%) |
|---|---|
Chromium (Cr) | 19.00–23.00 |
Nickel (Ni) | 23.00–28.00 |
Molybdenum (Mo) | 4.00–5.00 |
Copper (Cu) | 1.00–2.00 |
Manganese (Mn) | ≤ 2.00 |
Silicon (Si) | ≤ 1.00 |
Carbon (C) | ≤ 0.020 |
Phosphorus (P) | ≤ 0.045 |
Sulfur (S) | ≤ 0.035 |
Nitrogen (N) | ≤ 0.10 |
Iron (Fe) | Balance |
O.D. or I.D. Diameter (Inch) | Equivalent Decimal (Inch) | Nominal Pipe Size (NPS) | Typical Threads per Inch (TPI) |
|---|---|---|---|
5/16 | 0.313 | 1/16 | 27 |
13/32 | 0.405 | 1/8 | 27 |
35/64 | 0.540 | 1/4 | 18 |
43/64 | 0.675 | 3/8 | 18 |
27/32 | 0.840 | 1/2 | 14 |
1-3/64 | 1.050 | 3/4 | 14 |
1-5/16 | 1.315 | 1 | 11-1/2 |
1-21/32 | 1.660 | 1-1/4 | 11-1/2 |
1-29/32 | 1.900 | 1-1/2 | 11-1/2 |
2-3/8 | 2.375 | 2 | 11-1/2 |
2-7/8 | 2.875 | 2-1/2 | 8 |
3-1/2 | 3.500 | 3 | 8 |
4 | 4.000 | 3-1/2 | 8 |
4-1/2 | 4.500 | 4 | 8 |
Material | Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Density | Melting Point |
|---|---|---|---|---|---|
Cast Stainless Steel 904L Pipe Fittings | Typically varies by casting specification and heat treatment | Depends on the applicable casting standard | Depends on casting specification and test results | Approx. 7.9–8.0 g/cm³ | Approx. 1300–1400 °C (2372–2552 °F) |
Stainless Steel 904L Pipe Fittings are available in a wide selection of configurations, including elbows, tees, reducers, caps, and customized designs to meet different industrial piping and engineering requirements. They can be supplied in various sizes, schedules, wall thicknesses, and end connections based on project drawings, installation needs, and applicable dimensional standards. Each order can be specified with attention to material grade, surface finish, fitting geometry, and dimensional accuracy to support dependable installation and consistent product quality. Depending on the fitting type and manufacturing method, relevant ASTM, ASME, or other agreed international specifications may apply. Since Stainless Steel 904L is a high-alloy stainless steel designed for demanding corrosive environments, its suitability should be assessed against the process fluid, operating temperature, fabrication method, and service conditions. Material verification, dimensional checks, product identification, and inspection documentation can help maintain traceability and demonstrate conformity with agreed project requirements. These fittings are used in chemical-processing equipment, pharmaceutical plants, petrochemical facilities, desalination systems, pulp and paper installations, and other industrial piping applications where corrosion resistance, dimensional precision, durability, and dependable service performance are essential.






We supply Stainless Steel 904L Pipe Fittings in line with applicable material standards and project-specific requirements, depending on the fitting design, manufacturing process, and intended operating environment. Our range can be arranged in different configurations, dimensions, schedules, wall thicknesses, and connection styles to meet the needs of industrial piping systems, equipment maintenance, fabrication work, and specialized engineering projects. At Jai Hind Metal, we focus on material traceability, dimensional precision, surface quality, and consistent workmanship to help ensure that supplied fittings meet the agreed technical specifications. Based on customer requirements, we can also coordinate customized sizes, specified tolerances, inspection and testing arrangements, material test certificates, heat-number identification, product marking, and supporting quality documentation. As Stainless Steel 904L is valued for its resistance to many corrosive environments, the appropriate material specification and compatibility with the process fluid should be confirmed before selection. For product information, technical specifications, or customized requirements, email us at info@jaihindmetal.com.
Stainless Steel 904L Pipe Fittings are widely chosen for industrial piping systems that demand excellent corrosion resistance, dependable mechanical properties, and long-term performance in aggressive operating environments. Their high-alloy composition, containing chromium, nickel, molybdenum, and copper, helps protect against pitting and crevice corrosion and improves resistance to many acidic process conditions. These fittings are commonly used in chemical processing plants, pharmaceutical facilities, petrochemical industries, fertilizer plants, desalination systems, pulp and paper mills, and specialized industrial equipment. Available configurations, such as elbows, tees, reducers, caps, and custom-designed fittings, accommodate different piping layouts, connection requirements, and project specifications. Stainless Steel 904L is particularly valued in applications where corrosion protection and reduced maintenance are important for reliable plant operation. With its combination of strong corrosion resistance, good weldability, toughness, and durability in suitable chemical environments, Stainless Steel 904L Pipe Fittings are a dependable option for demanding industrial applications when the material grade is carefully matched to the process conditions.
Looking for high-quality industrial products manufactured to your specific requirements? Contact our team for product details, customized solutions, pricing, and timely delivery.
Email: info@jaihindmetal.com
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