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Stainless Steel 304/304L Pipe Fittings are widely used in various industries due to their excellent corrosion resistance, durability, and versatility. These fittings are manufactured from high-quality stainless steel, ensuring strength and reliability in both industrial and domestic applications. The 304 grade offers superior resistance to oxidation and corrosion, while 304L provides a lower carbon variant suitable for welding and high-temperature environments.
Our range of SS 304/304L pipe fittings includes elbows, tees, reducers, flanges, and couplings, catering to diverse piping system requirements. Each fitting is precision-engineered to meet international standards such as ASTM, ASME, and DIN, ensuring seamless integration with your existing pipelines. This wide selection allows for customization according to specific project needs.
Stainless Steel 304 and 304L pipe fittings are austenitic stainless steel materials widely used in various industries for their excellent corrosion resistance and versatility. Known for their durability, high strength, and aesthetic finish, these fittings are suitable for piping systems in chemical, petrochemical, food processing, pharmaceuticals, and water treatment industries.
SS 304 contains approximately 18% chromium and 8% nickel, along with low levels of carbon, manganese, and other trace elements. The 304L variant has lower carbon content (<0.03%) to minimize carbide precipitation during welding, enhancing corrosion resistance in welded structures and reducing susceptibility to intergranular corrosion.
One of the main advantages of SS 304/304L pipe fittings is their exceptional resistance to rust and chemical attack. They perform reliably in harsh environments such as chemical processing, petrochemical industries, and marine applications. Additionally, their smooth surface finish minimizes friction and prevents bacterial growth, making them suitable for sanitary and food-grade applications.
The mechanical strength of these fittings ensures long-term performance even under high pressure and temperature conditions. SS 304/304L pipe fittings are also easy to maintain and clean, reducing downtime and maintenance costs. This combination of strength, corrosion resistance, and ease of use makes them an ideal choice for critical piping systems.
304/304L pipe fittings exhibit tensile strength of 515–720 MPa and yield strength of 205–310 MPa. Elongation ranges from 40–60%, providing good ductility and toughness. These properties allow the fittings to withstand high-pressure piping applications and mechanical stress while maintaining reliability over time.
These stainless steel fittings offer excellent resistance to corrosion in oxidizing environments, such as air, water, and many chemical solutions. They also resist pitting and crevice corrosion in mild chloride environments, making them ideal for applications in water treatment, food processing, and marine industries.
Specification Table
| Specification | Details |
|---|---|
| Material Grades | Stainless Steel 304, Stainless Steel 304L |
| Standards | ASTM A403 / A182, ASME B16.9, ASME B16.11, DIN, ISO |
| Types of Fittings | Elbows (90°, 45°), Tees, Reducers (Concentric & Eccentric), Couplings, Caps, Stub Ends, Flanges |
| End Connections | Butt Weld, Socket Weld, Threaded |
| Size Range | 1/2" to 48" (12 mm to 1200 mm) or custom sizes |
| Schedule/Thickness | SCH 10, SCH 40, SCH 80, SCH 160, or customized |
| Surface Finish | Polished, Pickled & Passivated, Mill Finish, Satin Finish |
| Mechanical Properties |
Tensile Strength: 515 – 750 MPa Yield Strength: 205 – 310 MPa Elongation: 40 – 60% |
| Corrosion Resistance | Excellent resistance to oxidizing and mildly reducing environments; suitable for chemical, petrochemical, food, and pharmaceutical applications |
| Temperature Range | Up to 870°C (1600°F) for intermittent service, depending on grade |
| Applications | Industrial piping, chemical processing, food & beverage, oil & gas, water treatment, HVAC systems |
Chemical Composition (Typical ranges for SS304/304L)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | 304 (%) | 304L (%) |
|---|---|---|
| Carbon (C) | 0.08 max | 0.03 max |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 |
| Manganese (Mn) | 2.0 max | 2.0 max |
| Silicon (Si) | 1.0 max | 1.0 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.03 max | 0.03 max |
| Iron (Fe) | Balance | Balance |
Mechanical Properties (Typical)
| Property | 304 | 304L |
|---|---|---|
| Tensile Strength | 515 – 750 MPa | 485 – 690 MPa |
| Yield Strength | 205 – 310 MPa | 170 – 280 MPa |
| Elongation | 40 – 60% | 45 – 60% |
| Hardness (Brinell) | 170 – 210 HB | 150 – 190 HB |
| Hardness (Rockwell B) | 79 – 91 HRB | 77 – 88 HRB |
| Impact Strength | ≥ 50 J at room temperature | ≥ 50 J at room temperature |
| Operating Temperature | Up to 870°C (1600°F) intermittent | Up to 870°C (1600°F) intermittent |
Equivalent Grades
| Standard | 304 | 304L |
|---|---|---|
| ASTM / ASME | A403 WP304 / A182 F304 | A403 WP304L / A182 F304L |
| EN / DIN | 1.4301 | 1.4307 |
| JIS | SU304 | SU304L |
| GB / China | 0Cr19Ni9 | 0Cr19Ni9 |
| ISO | 304 | 304L |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Size (inch) | Nominal Size (mm) | Schedule | Outside Diameter (mm) | Wall Thickness (mm) | Weight per Meter (kg/m) |
|---|---|---|---|---|---|
| 1/2" | 15 | 10 | 21.3 | 2.77 | 0.91 |
| 3/4" | 20 | 10 | 26.7 | 2.87 | 1.21 |
| 1" | 25 | 10 | 33.4 | 3.38 | 1.68 |
| 2" | 50 | 40 | 60.3 | 3.91 | 4.01 |
| 4" | 100 | 40 | 114.3 | 4.78 | 8.90 |
| 6" | 150 | 40 | 168.3 | 6.02 | 15.60 |
| 8" | 200 | 40 | 219.1 | 6.55 | 23.00 |
| 10" | 250 | 40 | 273.0 | 7.11 | 33.20 |
| 12" | 300 | 40 | 323.9 | 7.62 | 44.00 |
Types Of Stainless Steel 304/304L Pipe Fittingss and Tubes
SS 310 Seamless Pipe
SS 310 Welded Pipe
SS 310 ERW Pipe
SS 310S EFW Pipe
Stainless Steel 310S Seamless Tube
310H Stainless Steel Welded Tube
310 Stainless Steel Capillary Tube
310H Stainless Steel Heat Exchanger Tubes
Frequently Asked Questions (FAQ)
What is the difference between 304 and 304L Stainless Steel?
304L has a lower carbon content than 304, making it more suitable for welding and reducing the risk of carbide precipitation.
What types of fittings are available in SS 304/304L?
Elbows, tees, reducers (concentric & eccentric), couplings, caps, stub ends, and flanges.
What are the common applications of SS 304/304L pipe fittings?
Used in chemical processing, food & beverage, pharmaceuticals, oil & gas, water treatment, and HVAC systems.
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