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Home > Stainless Steel >Stainless Steel 348 Pipes
Stainless Steel 316 and 316L instrumentation tubing are top-notch tubes that find their way into a wide range of industries, especially where precision, strength, and resistance to corrosion are key. Both grades are austenitic stainless steels enriched with molybdenum, which boosts their ability to withstand corrosion, particularly from chlorides and other tough chemicals. While Stainless Steel 316 has a bit more carbon than 316L, giving it better strength at higher temperatures, 316L is often the go-to choice for welded applications. This is because its lower carbon content minimizes the risk of carbide precipitation and keeps its corrosion resistance intact after welding. You’ll commonly see these tubes in sectors like petrochemical, food processing, pharmaceuticals, and instrumentation systems.
These Stainless Steel 348 Pipes are distinguished by their unique composition, which includes columbium for enhanced stability and excellent resistance to intergranular corrosion. In terms of strength, they offer impressive tensile and yield strengths, allowing them to perform reliably under high-stress conditions. This combination of a resilient alloy structure and superior mechanical properties ensures these pipes can maintain their integrity and functionality even when facing intense pressure and challenging environments. This inherent toughness makes them a fundamentally sensible choice.
| 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.
When it comes to composition, Stainless Steel 316 and 316L tubing are made up of iron, chromium (16-18%), nickel (10-14%), molybdenum (2-3%), along with trace amounts of elements like manganese and silicon. The extra molybdenum in both grades offers exceptional resistance to pitting and crevice corrosion, particularly in environments rich in chlorides. The main distinction between 316 and 316L lies in their carbon content, with 316L having a lower maximum carbon percentage of 0.03%, making it a better fit for welding applications. Both grades boast impressive mechanical properties, including high tensile strength (up to 620 MPa for 316 and 480 MPa for 316L) and good elongation, which allows them to be flexible and durable under various operating conditions.
Corazon Pipes and Tubes, one of the largest suppliers of Stainless Steel 348 Pipes in Manila, Philippines, 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 tubes are crucial for transporting liquids, gases, and other materials in systems that demand high purity and precision. They play a vital role in industries like oil and gas, pharmaceuticals, chemical processing, and food and beverage, where they are used in critical applications such as flow lines, sample lines, analytical instrumentation, and pressure measurement systems. Their ability to resist corrosion and endure high temperatures makes them an excellent choice for these demanding environments.
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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