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Stainless Steel 304, 304L & 304LN Pipes & Tubes Supplier & Stockist in India
Corrosion-resistant fluid conveyance and structural frameworks require versatile 18-8 chromium-nickel austenitic alloys engineered for severe chemical, cryogenic, and structural duties. Steel Emporium is a premier Stainless Steel 304L Pipes & Tubes Supplier in India, delivering precision-engineered tubing solutions certified to withstand intergranular decay and high-pressure fluid dynamics.
To meet tight production schedules, we are a full-inventory Stainless Steel 304 Pipes & Tubes Stockist in India, offering ready-to-ship Stainless Steel 304 Pipes, Stainless Steel 304 Tubes, SS 304L Pipes, and SS 304L Tubes in seamless, ERW, and welded options. Backed by 25+ years of expertise, our supply chain strictly meets ISO 9001:2015 quality standards and full mill certification.
For applications requiring superior marine corrosion resistance or high-temperature capabilities, explore our complementary Stainless Steel 316L & 316LN Pipes & Tubes and heat-resistant Stainless Steel 321 & 321H Pipes & Tubes stock lists for specialized environments.
For high-pressure vessels needing enhanced strength with complete corrosion protection, rely on a leading Stainless Steel 304LN Pipes & Tubes Stockist in India. We supply Stainless Steel 304LN Pipes and SS 304LN Tubes under ASTM A312, ASTM A213, and ASTM A269 standards with MTC verification and direct mill pricing.
Jump To Section: Material Specs | Grade Selection | Size Chart | FAQs
ASTM A213 / A269 / A312 SS 304, 304L & 304LN Technical Specifications
Our processing facilities deliver precision cold drawing, bright annealing, custom length cutting, and surface polishing across all 18-8 grade variants.
| Technical Parameter | Specification Scope & Manufacturing Capabilities |
|---|---|
| Governing Specifications | ASTM A213 / A269 / A312, ASME SA312, DIN, EN, JIS, AISI |
| Grade Variants | Stainless Steel 304 (UNS S30400), 304L (UNS S30403), 304LN (UNS S30453) |
| Manufacturing Types | Seamless, Welded, ERW, EFW, Cold Drawn (CDW), Hot Finished |
| Profile Configurations | Round, Square, Rectangular, Hydraulic, Custom Shapes |
| Outside Diameter (OD) Scope | Seamless: 6 mm to 114.3 mm OD | Welded / ERW: 10 mm to 114.3 mm OD (1/2" to 24" Nominal) |
| Schedule Wall Thickness Range | SCH 5S, SCH 10S, SCH 20, SCH 30, SCH 40S, STD, SCH 80S, SCH 120, SCH 160, XXS |
| Length & End Treatments | 1m to 12.5m, Custom Cut | Plain, Beveled, Threaded Ends |
| Surface Finish & Coatings | AP (Annealed & Pickled), BA (Bright Annealed), 180–400 Grit Polish, Electropolished |
Grade Selection Guide: Choosing Between 304, 304L & 304LN
SS 304 Pipes & Tubes – Best for General Factory & Water Lines
Standard SS 304 Pipes contain a balanced matrix of 18% chromium and 8% nickel, providing exceptional resistance to oxidation up to 870°C in intermittent service. As a dedicated Stainless Steel 304 Pipes & Tubes Stockist in India, we supply this grade for ambient processing lines, potable water lines, and architectural structures where heavy post-weld corrosion exposure is absent.
SS 304L Pipes & Tubes – Low Carbon for Safe Welding
Sourcing from a primary Stainless Steel 304L Pipes & Tubes Supplier in India provides an ultra-low carbon alloy (0.030% max) that prevents chromium carbide precipitation during welding. This allows heavy-gauge SS 304L Tubes and pipes to operate safely in aggressive chemical environments in the as-welded condition without needing post-weld solution annealing.
SS 304LN Pipes & Tubes – The High-Strength Nitrogen-Enhanced Grade
Partnering with a specialized Stainless Steel 304LN Pipes & Tubes Stockist in India grants access to a nitrogen-alloyed (0.10-0.16%) low-carbon matrix. The addition of interstitial nitrogen acts as a solid-solution strengthener, raising the yield strength of SS 304LN Pipes to 240 MPa min-significantly higher than 304L-while retaining maximum resistance to intergranular corrosion and cryogenic impact fracture.
Chemical, Mechanical & Equivalent Specifications
| Element / Parameter | SS 304 (UNS S30400) | SS 304L (UNS S30403) | SS 304LN (UNS S30453) |
|---|---|---|---|
| Carbon (C) | 0.08% Max | 0.030% Max | 0.030% Max |
| Manganese (Mn) | 2.00% Max | 2.00% Max | 2.00% Max |
| Silicon (Si) | 0.75% Max | 0.75% Max | 0.75% Max |
| Phosphorus (P) | 0.045% Max | 0.045% Max | 0.045% Max |
| Sulfur (S) | 0.030% Max | 0.030% Max | 0.030% Max |
| Chromium (Cr) | 18.0 – 20.0% | 18.0 – 20.0% | 18.0 – 20.0% |
| Nickel (Ni) | 8.0 – 10.5% | 8.0 – 12.0% | 8.0 – 10.5% |
| Nitrogen (N) | 0.10% Max | 0.10% Max | 0.10 – 0.16% |
| Mechanical Property | SS 304 | SS 304L | SS 304LN |
|---|---|---|---|
| Tensile Strength (MPa min) | 515 | 485 | 550 |
| Yield Strength (0.2% Proof MPa min) | 205 | 170 | 240 |
| Elongation (% in 50 mm min) | 40% | 40% | 35% |
| Hardness (Brinell Max) | 201 HBW | 201 HBW | 217 HBW |
| Standard / Grade | WERKSTOFF NR. | UNS Number | EN Standard | JIS (Japan) |
|---|---|---|---|---|
| SS 304 | 1.4301 | S30400 | X5CrNi18-10 | SUS 304 |
| SS 304L | 1.4306 / 1.4307 | S30403 | X2CrNi19-11 | SUS 304L |
| SS 304LN | 1.4311 | S30453 | X2CrNiN18-10 | SUS 304LN |
Stainless Steel 304 Series Size & Schedule Chart
| Nominal Size (NB) | SCH 5S / 10S Wall | SCH 40S Wall | SCH 80S / 160 Wall |
|---|---|---|---|
| 1/2" NB (21.34 mm OD) | 1.65 mm / 2.11 mm | 2.77 mm | 3.73 mm / 4.78 mm |
| 3/4" NB (26.67 mm OD) | 1.65 mm / 2.11 mm | 2.87 mm | 3.91 mm / 5.56 mm |
| 1" NB (33.40 mm OD) | 1.65 mm / 2.77 mm | 3.38 mm | 4.55 mm / 6.35 mm |
| 1-1/2" NB (48.26 mm OD) | 1.65 mm / 2.77 mm | 3.68 mm | 5.08 mm / 7.14 mm |
| 2" NB (60.32 mm OD) | 1.65 mm / 2.77 mm | 3.91 mm | 5.54 mm / 8.74 mm |
| 3" NB (88.90 mm OD) | 2.05 mm / 3.05 mm | 5.49 mm | 7.62 mm / 11.13 mm |
| 4" NB (114.30 mm OD) | 2.11 mm / 3.05 mm | 6.02 mm | 8.56 mm / 13.49 mm |
| 6" NB (168.28 mm OD) | 2.77 mm / 3.40 mm | 7.11 mm | 9.52 mm / 18.26 mm |
Key Industrial Applications
Selecting the 304 series alloy provides a versatile, highly corrosion-resistant solution across processing, cryogenic, and high-pressure industrial sectors.
Chemical & Petrochemical Refining (SS 304L)
Low-carbon SS 304L Pipes handle nitric acid distillation, organic acid storage, and heavy welded vessel connections without undergoing intergranular attack along heat-affected zones.
Cryogenic Fluid Handling & Storage (SS 304LN)
SS 304LN Tubes are widely specified for liquefied natural gas (LNG) transport pipelines and liquid nitrogen storage loops due to elevated yield strength and resistance to brittle fracture down to -196°C.
Food, Dairy & Beverage Processing (SS 304)
Standard Stainless Steel 304 Tubes with internal electropolished surface finishes are installed in milk pasteurization loops, brewery lines, and sanitary fluid systems requiring non-contaminating piping.
Power Generation & High-Pressure Piping (SS 304LN / 304)
Applied in feed-water heater tubing and steam lines, ASTM A213 304LN and 304 seamless tubes maintain structural integrity under severe pressure and thermal stresses.
Architectural & Sanitary Water Systems (SS 304 / 304L)
Deployed in potable municipal water distribution lines, exterior building facades, and high-purity utility loops where long-term oxidation resistance and surface hygienic standards are mandatory.
Quality Assurance, MTC Certification & Testing Standards
Every shipment processed by Steel Emporium undergoes verification under our ISO 9001:2015 & PED 2014/68/EU Quality Policy to guarantee compliance.
| Certification / Standard | Compliance & Testing Scope |
|---|---|
| ISO 9001:2015 & Pressure Compliance | Certified QMS with PED 2014/68/EU and AD 2000 Merkblatt approvals. |
| EN 10204 3.1 & 3.2 MTC | Official test reports covering heat numbers, chemistry, and factory origin tracking. |
| PMI & Lab Verification | 100% XRF spectro testing and NABL-accredited laboratory inspections. |
| Mechanical & Weld NDT | Hydrostatic, eddy current, and flaring tests guarantee 100% seam integrity. |
| Third-Party Inspection (TPI) | Inspection-ready for SGS, TUV, Bureau Veritas, or Lloyds. |
| Verified Corporate Address | Registered Office & Operations: 102, Durga Devi Street, Mumbai-400004, Maharashtra, India | Central Warehouse & Stockyard | Plot 943, Kalamboli Steel Market, Navi Mumbai - 410218, Maharashtra, India |
Frequently Asked Questions
Request a Technical Sourcing Quote
Ready to source high-performance 304, 304L, or 304LN stainless steel piping for your project? Connect with our technical sales specialists today for competitive wholesale pricing, MTC documentation, and global export shipping schedules.