Home > Stainless Steel > Stainless Steel 348 Pipe
Stainless Steel 348 Pipes refer to pipes made from the stainless steel alloy known as AISI 348 or UNS S34800. This alloy is a stabilized, columbium-containing austenitic stainless steel, which offers excellent resistance to intergranular corrosion and high-temperature oxidation. Stainless Steel 348 Pipes are commonly used in high-temperature applications such as in furnaces, heat exchangers, and thermal processing equipment, where resistance to corrosion and heat is crucial. The addition of columbium helps to stabilize the material against sensitization and carbide precipitation during welding and high-temperature exposure, making it suitable for prolonged use in elevated temperature environments.
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 |
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We offer These Stainless Steel 348 Pipes as per DIN, ISO, JIS or ANSI Standard.
Stainless Steel 348 Pipes applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Yes, Stainless Steel 348 Pipes are fully recyclable. Stainless steel is a highly sustainable material that can be recycled repeatedly without losing its inherent properties. Recycling Stainless Steel 348 Pipes helps conserve natural resources, reduce energy consumption, and minimize environmental impact. The recycling process involves melting down the stainless steel scrap and reforming it into new products, including pipes, without compromising its quality or performance. Therefore, Stainless Steel 348 Pipes contribute to a circular economy by being part of a closed-loop recycling system.
Yes, Stainless Steel 348 Pipes are highly suitable for high-temperature applications. The alloy’s composition, including elements like chromium, nickel, and columbium, provides excellent heat resistance and stability at elevated temperatures. Stainless Steel 348 Pipes can withstand extreme heat without losing their structural integrity or experiencing significant degradation, making them ideal for use in environments such as high-temperature furnaces, heat exchangers, thermal processing equipment, and aerospace components. Additionally, the alloy’s resistance to intergranular corrosion and sensitization further enhances its performance in high-temperature conditions, making Stainless Steel 348 Pipes a reliable choice for demanding applications.
Stainless Steel 348 Pipes can be susceptible to galvanic corrosion when in contact with dissimilar metals in certain environments. Galvanic corrosion occurs when two different metals are in contact in the presence of an electrolyte, leading to accelerated corrosion of the less noble metal. While Stainless Steel 348 is corrosion-resistant, it can still experience galvanic corrosion if coupled with a more reactive metal such as carbon steel or aluminum. Proper insulation or the use of appropriate insulating materials can help mitigate galvanic corrosion risks when Stainless Steel 348 Pipes are installed in systems with dissimilar metals. Regular inspection and maintenance are also essential to identify and address any signs of galvanic corrosion early on, ensuring the longevity and reliability of the piping system.
Stainless Steel 348 Pipes are generally not recommended for use in conveying natural gas. While they offer excellent resistance to corrosion and high temperatures, they may not be the most suitable choice for natural gas applications due to potential concerns regarding embrittlement and cracking in certain conditions. For natural gas transmission and distribution systems, it’s typically preferred to use carbon steel pipes or specific stainless steel grades such as 304 or 316L, which are designed to meet the requirements and standards for gas transportation. These grades offer good mechanical properties and corrosion resistance specifically tailored for gas pipeline applications, ensuring safe and reliable operation over the long term.
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