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Home > Stainless Steel >Stainless Steel 348 Pipes
Laila Pipes and Tubes is a reputable manufacturer and supplier of top-notch Stainless Steel 348 Pipes based in Muscat, Oman. They specialize in precision-engineered pipes that adhere to international standards, making them perfect for tough, high-temperature, and corrosive environments. With state-of-the-art manufacturing facilities, rigorous quality control measures, and a talented technical team, Laila Pipes and Tubes caters to various industries, including chemical processing, power generation, petrochemical, aerospace, and oil and gas. Their commitment to consistent quality, prompt delivery, and customer-centric service has helped them build a solid reputation in both regional and global markets.
Stainless Steel 348 Pipes are a niobium-stabilized austenitic stainless steel alloy, similar to grade 347, with a composition that contains 17–20% chromium and 9–13% nickel. Niobium addition enhances resistance to intergranular corrosion and inhibits carbide precipitation during welding and prolonged heating. The pipes usually possess tensile strength of 515–750 MPa and yield strength of about 205 MPa. Stainless Steel 348 is resistant to both elevated temperature and shows stability in structural strength with excellent resistance to oxidation, good weldability, and general durability in high-stress conditions.
| Sizes: | 1/8″ to 24″ |
| ASTM A312 Steel grades: | TP304/304L/304H |
| ASTM A312 Schedules: | STD, XS, XXS, SCH5S, SCH10/10S, SCH20, SCH30, SCH40/40S, SCH60, SCH80/80S, SCH100, SCH120, SCH140, SCH160 |
| Standards: | ASTM A312, ASME SA312 |
| Lengths: | SRL and DRL 5meters up to 11meters available from Stock or Production. |
| Ends: | Plain/Bevelled |
| Element | Content (%) |
|---|---|
| Iron, Fe | 66 |
| Chromium, Cr | 19 |
| Nickel, Ni | 11 |
| Manganese, Mn | 2.0 |
| Silicon, Si | 1.0 |
| Nb + Ta | 0.8 |
| Cobalt, Co | 0.2 |
| Tantalum, Ta | 0.1 |
| Carbon, C | 0.080 |
| Phosphorous, P | 0.045 |
| Sulfur, S | 0.030 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength (@ strain 0.200%) | 275 MPa | 39900 psi |
| Izod impact | 120 – 160 J | 88.5 – 118 ft-lb |
| Charpy impact | 160 J | 118 ft-lb |
| Shear modulus (typical for steel) | 77.0 GPa | 11200 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 45% | 45% |
| Hardness, Brinell (converted from Rockwell B hardness) | 147 | 147 |
| Hardness, Knoop (converted from Rockwell B hardness) | 164 | 164 |
| Hardness, Rockwell B | 85 | 85 |
| Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Stainless Steel 348 pipes are austenitic stainless steels that are stabilized with niobium (columbium), providing outstanding resistance to intergranular corrosion. These pipes typically contain around 17–20% chromium, 9–13% nickel, and a controlled amount of carbon, with niobium added for stability at elevated temperatures. They boast high tensile strength, good creep resistance, and excellent dimensional stability during welding and extended thermal exposure. Plus, they offer remarkable oxidation resistance in high-temperature settings.
Laila Pipes and Tubes, one of the largest suppliers of Stainless Steel 348 Pipes in Muscat, OMAN, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
| NPS | OD | SCH 5S | SCH 10S | SCH 40S | SCH 80S |
| 1/4 | 13.72 | – | 1.65 | 2.24 | 3.02 |
| 3/8 | 17.15 | – | 1.65 | 2.31 | 3.2 |
| 1/2 | 21.34 | 1.65 | 2.11 | 2.77 | 3.73 |
| 3/4 | 26.67 | 1.65 | 2.11 | 2.87 | 3.91 |
| 1 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 1.25 | 42.16 | 1.65 | 2.77 | 3.56 | 4.85 |
| 1.5 | 48.26 | 1.65 | 2.77 | 3.68 | 5.08 |
| 2 | 60.33 | 1.65 | 2.77 | 3.91 | 5.54 |
| 2.5 | 73.03 | 2.11 | 3.05 | 5.16 | 7.01 |
| 3 | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 3.5 | 101.6 | 2.11 | 3.05 | 5.74 | 8.08 |
| 4 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 5 | 141.3 | 2.77 | 3.4 | 6.55 | 9.53 |
| 6 | 168.28 | 2.77 | 3.4 | 7.11 | 10.97 |
| 8 | 219.08 | 2.77 | 3.76 | 8.18 | 12.7 |
| 10 | 273.05 | 3.4 | 4.19 | 9.27 | 12.7 |
| 12 | 323.85 | 3.96 | 4.57 | 9.53 | 12.7 |
| 14 | 355.6 | 3.96 | 4.78 | 9.53 | 12.7 |
| 16 | 406.4 | 4.19 | 4.78 | 9.53 | 12.7 |
| 18 | 457.2 | 4.19 | 4.78 | 9.53 | 12.7 |
| 20 | 508 | 4.78 | 5.54 | 9.53 | 12.7 |
| 22 | 558.8 | 4.78 | 5.54 | – | – |
| 24 | 609.6 | 5.54 | 6.35 | 9.53 | 12.7 |
| 26 | 660.4 | – | – | – | – |
| 28 | 711.2 | – | – | – | – |
| 30 | 762 | 6.35 | 7.92 | – | – |
These Stainless Steel 348 pipes find extensive use in high-temperature and corrosive applications. They’re commonly utilized in boilers, heat exchangers, superheaters, and chemical processing equipment. Industries like petrochemical, power generation, and oil and gas depend on them for piping systems and components that endure thermal cycling and harsh environments. Additionally, Stainless Steel 348 pipes are essential in aerospace and industrial applications where high strength, long-lasting performance, and resistance to oxidation and intergranular corrosion are crucial.
Stainless Steel 348 Pipes are found to be useful in applications where there is high-temperature and pressure operation such as heat exchangers, pressure vessels, reactor components, and exhaust ducts. The pipes find widespread application in power plants, petrochemical plants, and aerospace systems where thermal fatigue and intergranular corrosion are to be prevented. These pipes are best suited to uses involving frequent exposure to high temperatures or welded fabrication, since the niobium stabilization avoids sensitization. Stainless Steel 348 offers a reliable solution to tough and intricate operating conditions where mechanical stability and corrosion resistance are necessary.
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