Nakamura Stainless, located in Pulau Ujong, Singapore, is a trusted maker and supplier of high-quality stainless steel products, including stainless steel 347H tubing. This tubing is made for high-temperature and high-pressure environments. It provides excellent resistance to intergranular corrosion and offers superior creep strength. Nakamura Stainless uses strict quality control and precision engineering to make sure the tubing meets tough industrial standards. Thanks to its strong high-temperature performance, stainless steel 347H tubing is widely used in industries like petrochemical, power generation, heat exchangers, and aerospace, where long-term reliability under heat is crucial.
Stainless steel 347H tubing is an austenitic stainless steel alloy with about 17 to 19% chromium, 9 to 13% nickel, and niobium (columbium) as a stabilizing element. It also has more carbon than standard 347, which boosts its high-temperature strength and creep resistance. This composition stops carbide precipitation during welding and high-temperature service, providing excellent resistance to intergranular corrosion. Mechanically, 347H tubing has a tensile strength of about 550 to 750 megapascals and maintains its structural integrity at temperatures over 800°C, making it suitable for extended high-heat situations.
| Specifications | ASTM A/ASME SA213/A249/A269/A312/A358 |
| Dimensions | ASTM, ASME, and API |
| Size | 1/8″NB TO 30″NB IN |
| 304 Pipes & Tubes Size | 1/2″ NB – 16″ NB |
| ERW 304 Pipes & Tubes | 1/2″ NB – 24″ NB |
| EFW 304 Pipes & Tubes | 6″ NB – 100″ NB |
| Thickness | 0.3mm – 50 mm |
| Specialized in | Large Diameter Size |
| Schedule | SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | Round, Square, Rectangular, Hydraulic, Oval, U Shape, Pan Cake Coils, Coiled Etc |
| Length | Single Random, Double Random & Required Length. |
| End | Plain End, Beveled End, Treaded |
| Stainless Steel | Nickel | Magnesium | Silicon | sulfur | Carbon | Chromium | Phosphorus | Molybdenum | Nitrogen | |
| 347H | Minimum | 9 | 00.04 | 17 | 3 | |||||
| Maximum | 13 | 2 | 1 | 00.030 | 00.10 | 19 | 00.045 | 4 | ||
| SS Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
| Rockwell B | Brinell | ||||
| SS 347H | 515 | 205 | 40 | 92 | 201 |
Contact us to get a quick quote for your requirement.
We offers highest quality in its Stainless Steel 347H Tubing with severe testing and certification. Each product is thoroughly checked for dimensional measurements, mechanical tests, and corrosion resistance. Full certification including MTCs will be provided by us for your assurance that all the international standards and requirements are met.
This tubing comes in various sizes, typically ranging from 1/8″ to 12″ in diameter. It offers high resistance to oxidation and corrosion, particularly in high-temperature environments. Ideal for applications requiring robust strength and durability.
Available in diameters from 1/2″ to 12″, this tubing is welded and offers similar high-temperature strength as seamless options. It is highly resistant to intergranular corrosion and is used in environments exposed to sulfuric and nitric acids.
These tubes are generally available in sizes from 1/4″ to 2″ OD. They are specifically designed for high-efficiency heat transfer and offer excellent resistance to oxidation and sulfidation. Suitable for use in high-temperature heat exchangers.
Instrumentation tubing sizes typically range from 1/16″ to 1″. It is designed for precise and reliable measurements in harsh environments, providing excellent resistance to corrosion and high temperatures.
Available in diameters from 1/2″ to 5″, these tubes are designed to withstand high pressures and temperatures in boilers. They offer strong resistance to oxidation and carburization, making them ideal for high-temperature steam applications.
These tubes are usually sized from 1/2″ to 3″ in diameter and are formed into a U-shape for use in heat exchangers and other applications. They provide high resistance to corrosion and high-temperature deformation.
Condenser tubes come in sizes from 1/2″ to 3″ OD. They are designed for efficient heat transfer and resist corrosion from various coolants and environmental conditions, ensuring longevity in condenser systems.
Stainless steel 347H tubing is used in tough applications that involve continuous exposure to high temperatures and corrosive environments. It’s commonly found in boilers, superheaters, heat exchangers, pressure vessels, and refinery equipment. The tubing is especially useful for systems operating above 600°C, where resistance to oxidation, stress rupture, and creep deformation is important. Its strong weldability and thermal stability also make it a popular choice in the chemical, petrochemical, and aerospace industries for transporting high-temperature fluids and gases safely and efficiently.
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