304 304L Structural Stainless Steel Seamless Pipes
Section Shape:Round
Production Standards:ASTM A312
Material:Stainless Steel
Surface Treatment:Oiled, Polished, Coating Shape Type:Round, Square, Rectangular
Process:Hot Rolled, Cold Rolled
Transport Package:Sea-Worthy Packing
Specification:6mm-2500mm (3/8"-100")
Key advantages of 304 304L Structural Stainless Steel Seamless Pipes
304 and 304L stainless steel structural pipes belong to the 18-8 series of austenitic stainless steels, containing 18-20% chromium and 8-10.5% nickel. They form a stable austenitic structure, offering basic corrosion resistance and suitability for a wide temperature range from -196°C to 800°C.
What are the differences between 304 and 304L stainless steel mechanical pipes?
304L stainless steel has a carbon content of ≤0.03% (compared to ≤0.08% in 304), which significantly enhances its resistance to intergranular corrosion. It maintains corrosion resistance without requiring post-weld heat treatment, making it suitable for applications sensitive to welding, such as chemical equipment and medical devices.
In contrast, 304 stainless steel is more cost-effective and commonly used in general corrosion-resistant structures such as architectural decoration and low-temperature containers. However, after welding, it requires solution annealing to restore its corrosion resistance.
304 304L stainless steel Pipes for the petroleum industry Stockist
Reasons to choose GNEE
GNEE supplies materials that are fully verifiable, from raw material test certificates to final dimensional declarations. , while minimizing manufacturing time.
Tests we perform: Mass testing, Chemical inspection - Spectroscopic analysis, Hardness testing, Pitting protection testing, Impact analysis, Eddy current testing, Hydrostatic analysis.
For 304 304L Stainless Steel Structural Pipes price list, salt spray test report or factory tour, please click the button below to connect with our technical team!
304 Stainless Commercial Tubing Specifications
| Material | – | 304 (18Cr-8Ni) / 304L (18Cr-10Ni, low carbon ≤0.03%) |
| Standards | – | ASTM A312 (Seamless), ASME SA312, ISO 683-10, EN 10216-5 |
| Outer Diameter (OD) | mm | 6.35mm–610mm (0.25"–24") Common Sizes: 12.7mm (0.5"), 48.3mm (1.9"), 114.3mm (4") |
| Wall Thickness (WT) | mm | 1.0mm–50mm (Customizable) Common Sizes: 2.0mm, 3.0mm, 4.5mm, 6.0mm |
| Length | m | Standard: 3m–12m Customizable: Cut-to-length (e.g., 6m, 9m) |
| Tolerance | mm | OD: ±1% WT: ±10% |
| Mechanical Properties | – | Yield Strength ≥205 MPa (304L ≥170 MPa) Tensile Strength ≥515 MPa Elongation ≥35% |
| Surface Finish | – | Annealed & Pickled (AP), Sandblasted, Polished (Ra ≤1.6μm) |
| Chemical Composition | % | Cr: 18–20, Ni: 8–10 (304)/10–12 (304L), C≤0.08 (304)/C≤0.03 (304L), Mn≤2.0 |
SS 304/304L Seamless Pipe Manufacturers in China
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304 Austenitic Stainless Steel Tubes Packaging
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