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Home > Stainless Steel Tubing > Stainless Steel 348 Tubing
Blundell Pipes and Tubes, located in Hamilton, New Zealand, stands out as a top manufacturer and supplier of high-quality stainless steel tubing. They provide Stainless Steel 348 tubing, specifically crafted for industrial uses that require outstanding high-temperature strength, corrosion resistance, and long-lasting reliability. Known for their precision engineering and commitment to international standards, Blundell Pipes and Tubes caters to various sectors, including chemical processing, petrochemical, power generation, and engineering. Their tubing solutions are designed to enhance operational efficiency, maintain structural integrity, and deliver dependable performance even in tough environments.
Stainless Steel 348 Tubing is a columbium-stabilized austenitic stainless steel with an equivalent composition to grade 347, containing 17–20% chromium, 9–13% nickel, and columbium (niobium) for improved intergranular corrosion resistance. The stabilization helps to prevent carbide precipitation upon welding and exposure to high temperatures for extended periods. The tubing’s tensile strength is generally 515–750 MPa, while the yield strength is approximately 205 MPa. It has mechanical properties at service temperatures of up to 870°C and is weldable, oxidation-resistant, and structurally stable against thermal stress.
| 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 tubing is an austenitic chromium-nickel alloy that’s stabilized with titanium to avoid carbide precipitation during high-temperature applications. It generally contains 17–19% chromium, 9–13% nickel, and 0.5% titanium. This tubing showcases impressive mechanical properties, boasting a tensile strength of 515–750 MPa, yield strength of 205–275 MPa, and elongation of 35–45%. It also offers exceptional resistance to creep, oxidation, and intergranular corrosion, making it perfect for continuous use in harsh, high-temperature settings.
Blundell Pipes and Tubes, a leading supplier of Stainless Steel 348 Tubing in Hamilton, New Zealand, provides a wide selection of premium pipes and tubes for diverse industrial applications. With a vast inventory and a strong focus on delivering outstanding service, they are the preferred choice for stainless steel products in the region.
You’ll find this tubing commonly used in heat exchangers, boiler components, chemical processing equipment, petrochemical facilities, and exhaust systems. Its blend of high-temperature stability, corrosion resistance, and mechanical strength makes Stainless Steel 348 tubing a trusted option for industries that need robust, high-performance tubing capable of enduring extreme operating conditions.
Stainless Steel 348 Tubing is applied in heat, corrosion-resistant applications, especially where welding must be done. Typical applications are reactor vessels and heat exchanger tubes, pressure piping, exhaust manifolds, and superheaters in power plants and petrochemical plants. It is also appropriate for nuclear-grade uses because of its stable composition and high stability when exposed to radiation and thermal cycling. Stainless Steel 348 Tubing provides a reliable option for those areas where long-term structural integrity, corrosion resistance, and mechanical strength are essential.
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