Stainless Steel 304L Pipes are one of the most popular grades in the stainless steel family, known for their low carbon content, corrosion resistance, and excellent weldability. The “L” in 304L stands for Low Carbon, which prevents carbide precipitation during welding and ensures superior resistance to intergranular corrosion.
These pipes are widely used across industries such as chemical processing, pharmaceuticals, food & beverage, oil & gas, and construction due to their durability and cost-effectiveness.
What is Stainless Steel 304L?
Stainless Steel 304L is a low-carbon variation of 304 stainless steel, designed to offer better corrosion resistance after welding. It contains 18–20% chromium and 8–12% nickel, giving it excellent strength and oxidation resistance even in humid or chemical-rich environments.
Key Features:
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Low carbon prevents sensitization during welding
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Excellent resistance to oxidation and corrosion
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Smooth surface finish suitable for sanitary applications
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Non-magnetic in the annealed condition
Chemical Composition of Stainless Steel 304L Pipes
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 12.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulphur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
This balanced composition allows SS 304L to maintain high strength while offering excellent resistance to a wide range of corrosive environments.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485 MPa (min) |
| Yield Strength | 170 MPa (min) |
| Elongation | 40% (min) |
| Hardness (Brinell) | 201 (max) |
| Density | 8.0 g/cm³ |
These mechanical properties make SS 304L Pipes suitable for high-pressure, high-temperature, and structural applications.
Manufacturing Types & Standards
SS 304L Pipes are available in different types depending on manufacturing methods and end-use requirements:
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Seamless Pipes: Produced from solid billets; used in high-pressure and high-temperature applications.
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Welded Pipes: Formed by welding steel strips or plates; ideal for low-pressure uses and general fabrication.
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ERW Pipes: Electric Resistance Welded pipes commonly used in construction and mechanical applications.
Common Standards:
ASTM A312, A213, A249, A269 / ASME SA312, SA213, SA249
Key Advantages of Stainless Steel 304L Pipes
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Corrosion Resistance: Performs exceptionally well in various environments including acidic, alkaline, and chloride media.
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Excellent Weldability: The low carbon content allows easy welding without risk of carbide precipitation.
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Durability: Long-lasting performance with minimal maintenance.
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Versatility: Suitable for food-grade, industrial, and decorative applications.
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Heat Resistance: Can withstand temperatures up to 870°C for intermittent service.
Applications of Stainless Steel 304L Pipes
Stainless Steel 304L Pipes are used across a wide range of industries, including:
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Chemical and Petrochemical Plants – For process piping and heat exchangers.
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Food & Beverage Industry – Hygienic and corrosion-resistant pipelines.
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Pharmaceutical Industry – Sterile processing lines and cleanroom piping.
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Oil & Gas – Suitable for offshore and refinery environments.
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Construction & Architecture – Railings, support structures, and ornamental tubing.
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Automotive & Mechanical Systems – Exhaust systems, hydraulic lines, and fuel handling.
Price of Stainless Steel 304L Pipes in India
The price of Stainless Steel 304L Pipes in India varies based on the pipe type, size, wall thickness, and finish.
Here’s an approximate guide:
| Product Type | Price Range (INR / Kg) |
|---|---|
| SS 304L Seamless Pipe | ₹350 – ₹480 / Kg |
| SS 304L Welded Pipe | ₹250 – ₹380 / Kg |
| SS 304L ERW Pipe | ₹230 – ₹350 / Kg |
Note: Prices may vary depending on quantity, manufacturer, and market fluctuations in nickel and chromium costs.
Marking, Packaging & Delivery
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Pipes are clearly marked with grade, size, heat number, and standards (ASTM/ASME).
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Packaging: Bundled or wrapped in plastic sheets with end caps to prevent damage during transport.
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Delivery: Available in both domestic and export-ready conditions with test certificates (EN 10204 3.1).
Why Choose Stainless Steel 304L Pipes?
Choosing SS 304L Pipes ensures long-term reliability, easy fabrication, and cost efficiency.
Whether for industrial piping systems, food-grade applications, or architectural projects, 304L stands out for its combination of performance, affordability, and durability.
Conclusion
Stainless Steel 304L Pipes offer the perfect blend of corrosion resistance, mechanical strength, and weldability, making them a top choice for diverse industrial applications. With an excellent balance of quality and price, 304L continues to be one of the most trusted stainless steel grades in India and worldwide.
If you’re looking for reliable Stainless Steel 304L Pipe suppliers, ensure they provide mill test certificates, standard compliance (ASTM A312/ASME SA312), and prompt delivery to guarantee product authenticity and performance.