Nakamura Stainless, located in Pulau Ujong, Singapore, is a reputable maker and supplier of premium stainless steel products, including stainless steel 348H tubing. Known for its high-temperature strength, stability, and resistance to intergranular corrosion, 348H tubing is perfect for applications that involve long exposure to high temperatures. Nakamura Stainless maintains strict quality control and precision manufacturing, making their 348H tubing a reliable option for industries such as aerospace, chemical processing, power generation, and heat treatment systems. These tubes deliver consistent performance and dependability in critical settings where thermal resistance and mechanical integrity are crucial.
Stainless steel 348H tubing is an austenitic stainless steel alloy containing about 17 to 19% chromium, 9 to 13% nickel, and stabilizing elements like columbium (niobium) and tantalum. It has a higher carbon content than standard 348 to boost high-temperature strength. This composition improves its resistance to sensitization and intergranular corrosion, especially after welding. Mechanically, it provides a tensile strength of about 550 to 750 megapascals and maintains its strength and structure at temperatures over 800°C. The stabilizers prevent carbide precipitation, making it suitable for continuous high-temperature use.
| 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 |
| AISI 348H Chemical Properties | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Ni | Cb | Co | Ta |
| 0.08 Max | 2.00 Max | 0.045 Max | 0.030 Max | 1.00 Max | 17.0-20.0 | 9.0-13.0 | 1.10 Max | 0.20 Max | 0.10 Max |
| Yeild strength | Tensile strength | Elongation | Reduction |
| Min 0.2% Mpa | Min Mpa | Min % | Min % |
| 205 | 515 | 30 | 50 |
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We maintains the maximum quality levels by conducting a serious testing and testing certification process to ensure Stainless Steel 348H Tubing quality. Each of the products, before they reach the customers’ doorstep, will undergo proper tests including dimensional verification, chemical analysis, and some mechanical testing procedures. The respective company issues an MTR ensuring the material conformity to international norms and specifications.
This tubing is seamless, available in various sizes with precise dimensions. It offers excellent corrosion resistance suitable for high-temperature applications.
Welded for structural integrity, available in a range of sizes. Known for its robust construction and corrosion resistance, ideal for industrial applications.
Designed specifically for heat transfer applications, available in customized sizes. Offers superior resistance to corrosion and thermal stress.
Precision tubing with controlled dimensions for instrumentation and control systems. Provides high corrosion resistance and reliability in sensitive environments.
Engineered for high-pressure boiler systems, available in standard and custom sizes. Resistant to corrosion and oxidation, ensuring long-term performance.
U-shaped tubes used in heat exchangers and condensers, available in diverse dimensions. Offers excellent resistance to corrosion and stress cracking.
Specifically designed for condenser applications, available in various diameters. Provides superior corrosion resistance and heat transfer efficiency.
Tubes with extended surface area for enhanced heat transfer efficiency, available in multiple configurations. Offers exceptional resistance to corrosion and oxidation.
Stainless steel 348H tubing finds applications in high-temperature and high-stress settings where resistance to oxidation and intergranular corrosion is essential. It’s commonly used in heat exchangers, superheaters, nuclear reactor components, exhaust systems, and chemical processing equipment. The tubing excels in environments requiring stability during thermal cycling and exposure to harsh chemicals. Due to its excellent weldability, thermal strength, and resistance to corrosion, 348H tubing is often the top choice for high-performance systems that need long-lasting durability under extreme operational conditions.
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