Nakamura Stainless, located in Pulau Ujong, Singapore, is a respected manufacturer and supplier of high-quality stainless steel products, including stainless steel 347H bars. These bars are designed for high-temperature applications. They offer great resistance to intergranular corrosion, superior creep strength, and dependable mechanical performance. Stainless steel 347H is a high-carbon, niobium-stabilized austenitic stainless steel that works exceptionally well under thermal stress. Nakamura Stainless focuses on precise manufacturing and strict quality control, delivering bars that meet the tough requirements of industries like petrochemical, power generation, and chemical processing.
Stainless steel 347H bars contain about 17 to 19% chromium, 9 to 13% nickel, and niobium (columbium) for stabilization. The higher carbon content in 347H boosts high-temperature strength and creep resistance. These bars have tensile strength ranging from 550 to 750 megapascals and maintain their structural integrity at temperatures above 800°C. Niobium prevents carbide precipitation during welding or thermal cycling, providing excellent resistance to intergranular corrosion and oxidation. 347H bars also offer good weldability and formability for use in complex assemblies.
| Specifications | ASTM A276 / ASME SA276 |
| Dimensions | ASTM, ASME |
| Range | 3.17 MM TO 350 MM DIA |
| Diameter | 25mm to 152mm |
| Length | 1 to 6 Meters, Custom Cut Length |
| Finish | Bright, Polish & Black |
| Form | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wiremesh, Billet, Ingot, Forging |
| Condition | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
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At Nakamura Stainless quality matters. Our Stainless Steel 347H Bars undergo rigorous testing, including tensile strength hardness, corrosion resistance tests so as to be in international standards. We have credible agencies certified thus we furnish material test certificates (MTCs) and third-party inspections. Ensuring reliability and unmatched performance in critical industrial applications.
Stainless Steel 347H Round Bars offer excellent corrosion resistance. Available in sizes ranging from 3mm to 200mm in diameter, these bars are ideal for applications in high-temperature environments due to their stability and durability.
These bars provide outstanding resistance to corrosion and oxidation. Stainless Steel 347H Flat Bars come in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, making them suitable for a variety of industrial uses.
Stainless Steel 347H Square Bars are perfect for high-stress applications. Available in sizes from 5mm to 100mm, they combine excellent mechanical properties with superior resistance to intergranular corrosion.
These bars are highly resistant to corrosion and scaling. Stainless Steel 347H Rectangular Bars are available in thicknesses from 1mm to 50mm and widths from 10mm to 500mm, ideal for structural and mechanical applications.
Stainless Steel 347H Hexagonal Bars offer excellent resistance to high temperatures and corrosion. Available in sizes ranging from 6mm to 75mm, they are widely used in the manufacturing of fasteners and other high-strength components.
These corrosion-resistant bars are available in a range of sizes. Stainless Steel 347H T-Bars provide excellent mechanical strength and are ideal for structural applications requiring high resistance to oxidation and corrosion.
Stainless steel 347H bars are often used in high-temperature and high-pressure settings, where long-term strength and corrosion resistance are crucial. Common applications include boiler components, heat exchangers, pressure vessels, superheaters, and high-temperature piping systems. These bars are perfect for petrochemical plants, power stations, refineries, and aerospace systems that face thermal cycling or extended exposure to high temperatures. With great thermal stability and mechanical strength, 347H bars provide reliable, long-lasting performance in demanding industrial conditions.
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