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304L stainless steel is the low carbon variant of 304, maximum carbon content is 0.03%, which reduces chromium carbide precipitation and significantly improves resistance to intergranular corrosion, especially in welded areas.
304L Stainless Steel Seamless Pipe are available in a variety of sizes and specifications that can be customized to meet customer needs, including different diameters, wall thicknesses and lengths.
304L stainless steel seamless pipe is a low-carbon (C≤0.03%) austenitic stainless steel pipe, which helps to minimize the risk of intergranular corrosion during welding, manufactured through a seamless process, avoiding welding defects.
304L stainless steel is a low-carbon variant of 304 (carbon content ≤ 0.03%),the low-carbon design reduces chromium carbide precipitation,minimize the risk of intergranular corrosion during welding, significantly improves resistance to intergranular corrosion, especially in welded areas.
304L Seamless Pipe is available in a variety of sizes and specifications that can be customized to meet customer needs, including different diameters, wall thicknesses and lengths. The surface treatments include annealed, pickled, polished and plated to meet different application requirements.
Standard: ASTM A312
Outdoor Diameter: 6.00 mm – 914.4 mm
Wall Thickness: 1mm – 150mm
Schedule: SCH5S, SCH10S, SCH40S, SCH80S, SCH160S, XS,SCH120,SCH160,etc
Length: Single Random, Double Random & Required Length
Type: Hot rolled, Cold rolled
Surface: Polishing,annealing,pickling,bright; 2B, No.4, No.1, No.8, 8K, HL, Mirror
End Finish: Plain End, Beveled End, Treaded
Additional Service: Custom cutting & beveling to spec lengths; Size and Specifications can be manufactured as clients’ requirements
| Класс | C | Mn | Si | P | S | Cr | Мо | Ni | N | |
| 304L | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.03 | 2.0 | 1.00 | 0.045 | 0.03 | 20.0 | 12.0 | – | ||
| Класс | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Удлинение (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304L | 485 | 170 | 40 | 92 | 201 |
| Класс | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/℃) | Thermal Conductivity (W/m.K) | Specific Heat 0-100℃ (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-100℃ | 0-315℃ | 0-538℃ | at 100℃ | at 500℃ | |||||
| 304L | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Low-carbon design reduces the risk of intergranular corrosion during welding and meets ASTM A312 standards. Maintains integrity over long periods, even in wet or chemical environments.
Composed of 18-20% chromium and 8-12% nickel, it ensures stable performance under high temperature and high pressure, reducing the frequency of maintenance to save long-term cost.
Seamless design enhances the pipe’s ability to withstand pressure and avoid leakage, which is suitable for industries with strict hygiene and safety requirements, such as pharmaceutical and food industries.
A wide range of sizes (OD DN6-DN600, wall thickness 0.5mm-50mm) and surface treatments (pickled, polished), available to meet the demand for non-standard sizes.
304L stainless steel seamless pipe is a widely used material in industry for its excellent corrosion resistance and mechanical properties.
| Feature | 304L | 304 |
| carbon centent | ≤0.03% | ≤0.08% |
| welding performance | Resistant to carbide precipitation, no annealing required | Annealing required after welding |
| Corrosion resistance | More resistant to intergranular corrosion (especially in welds) | Weaker |
| Low temperature toughness | Better (for -196°C) | Limited |
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