304L Stainless Steel Pipe & Tube
Jan 27, 2026
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What is 304L Stainless Steel Pipe & Tube?
304L Stainless Steel Pipe & Tube is the ultra-low carbon derivative of 304 series, optimized for anti-intergranular corrosion performance. Its low carbon content eliminates post-weld intergranular corrosion, making it ideal for welding-intensive piping systems.
Equivalent Grades (Horizontal)
UNS: S30403 | JIS: SUS304L | GB: 022Cr19Ni10 | EN: X2CrNi18-10 | W.Nr.: 1.4306
Chemical Composition (wt%, Horizontal)
C: ≤0.03 | Si: ≤1.00 | Mn: ≤2.00 | P: ≤0.045 | S: ≤0.030 | Cr: 18.00-20.00 | Ni: 8.00-12.00 | N: ≤0.10 | Fe: Balance
Key Properties (20°C, Annealed, Horizontal)
Density: 7.93g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: 485-650N/mm² | Yield Strength: ≥170N/mm² | Elongation: ≥40% | Hardness: ≤201HB
Core Characteristics
• Ultra-low carbon design: Effectively prevents intergranular corrosion after welding, no need for post-weld annealing, improving construction efficiency • Good corrosion resistance, consistent with 304 series in general media, suitable for medium-corrosion scenarios • Excellent ductility and toughness, even at low temperatures, no brittle fracture, adapting to low-temperature piping needs • Slightly lower tensile strength than 304, but more suitable for welding-intensive structures such as heat exchangers and pipeline networks
304 vs 304L Stainless Steel Pipe & Tube (Horizontal)
Carbon Content: 304 (≤0.08%) | 304L (≤0.03%) | Tensile Strength: 304 (515-690N/mm²) | 304L (485-650N/mm²) | Post-weld Annealing: 304 (May be needed) | 304L (Not needed) | Weld Adaptability: 304 (General) | 304L (Excellent)
| Grade | UNS No. | EN No. | C | Cr | Ni | Mo | Others |
| 304 | S30400 | 1.4301 | 0.08 | 18.00 - 20.00 | 8.00 - 12.00 | - | - |
| 304L | S30403 | 1.4307 | 0.035 | 18.00 - 20.00 | 8.00 - 12.00 | - | - |
| 310S | S31008 | 1.4845 | 0.08 | 24.00 - 26.00 | 19.00 - 22.00 | - | - |
| 316 | S31620 | 1.4401 | 0.08 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | - |
| 316L | S31603 | 1.4404 | 0.035 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | - |
| 316H | S31603 | - | 0.04 - 0.10 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | - |
| 316Ti | S31635 | 1.4571 | 0.08 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | Ti:5X(C+N) - 0.70 |
| 317L | S31703 | 1.4438 | 0.035 | 18.00 - 20.00 | 11.00 - 15.00 | 3.00 - 4.00 | - |
| 321 | S32100 | 1.4541 | 0.08 | 17.00 - 19.00 | 9.00 - 12.00 | - | Ti:5X(C+N) - 0.70 |
| 347 | S34700 | 1.4550 | 0.08 | 16.00 - 18.00 | 10.00 - 14.00 | - | - |
| 347H | S34709 | 1.4551 | 0.04 - 0.10 | 17.00 - 20.00 | 9.00 - 13.00 | - | - |
| 904L | S8904 | 1.4539 | 0.02 | 19.00 - 23.00 | 23.00 - 28.00 | - | N:0.10 max Cu : 1.0 - 2.0 |
304 Stainless Steel Suppliers
If you have project requirements for 304 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com
Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.
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