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Home > Stainless Steel >Stainless Steel 348 Pipes
Blundell Pipes and Tubes, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of top-notch stainless steel piping solutions. They specialize in precision-engineered Stainless Steel 348 pipes, crafted for tough industrial applications that demand high-temperature strength, corrosion resistance, and long-lasting reliability. With a strong commitment to international standards and meticulous manufacturing, Blundell Pipes and Tubes caters to various industries, including chemical processing, petrochemical, power generation, and engineering, delivering piping solutions that guarantee operational efficiency, durability, and structural integrity.
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.
Choosing Stainless Steel 348 Pipes from Blundell Pipes and Tubes offers a unique and durable look, ideal for a variety of industrial applications. Their pipes are highly resistant to corrosion and oxidation, making them suitable for harsh environments. Blundell’s commitment to standardized manufacturing assures consistent design and performance standards. In addition, their extensive inventory ensures on-time delivery, reducing downtime. The company’s focus on customer satisfaction means tailored solutions for specific needs. With competitive pricing and strong after-sales support, Blundell stands out as a trusted partner in your piping needs. Count on their expertise to improve your work efficiency and reliability.
Stainless Steel 348 pipes are titanium-stabilized austenitic chromium-nickel alloys that effectively resist carbide precipitation during high-temperature use. Typically, they contain 17–19% chromium, 9–13% nickel, and 0.5% titanium, which enhance their mechanical properties, boasting a tensile strength of 515–750 MPa, yield strength of 205–275 MPa, and elongation of 35–45%. These pipes excel in resisting oxidation, creep, and intergranular corrosion, making them perfect for continuous operation in harsh, high-temperature environments.
| 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 | – | – |
Common applications for Stainless Steel 348 pipes include heat exchangers, boilers, chemical processing equipment, petrochemical plants, and exhaust systems. Their unique blend of high-temperature stability, corrosion resistance, and mechanical strength makes them the go-to choice for industries that need durable, high-performance piping capable of enduring extreme operating conditions.
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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