Chung Metal distributes good-quality Stainless Steel 347 Round Bars/Rods, a niobium-stabilized austenitic stainless steel suitable for application in highly oxidizing conditions. SS 347 round bars are resistant to intergranular corrosion following welding and heat exposure, hence suitable for pressure vessels, piping systems, and heat exchangers. Chung Metal produces these rods with superior dimensional accuracy, surface finish, and metallurgical soundness. They are particularly preferred for applications involving frequent thermal cycling or continuous use at high temperature. The round shape improves machinability and structural stability for rotating or bearing parts.
SS 347 is 17–19% chromium and 9–13% nickel alloy, stabilized with niobium (columbium) to avoid carbide precipitation. The carbon content is ≤ 0.08%. It has tensile strength of 550–750 MPa, yield strength of 200–300 MPa, and elongation of 30–40%. The alloy has high strength and ductility at elevated temperatures (up to 870°C). It is not magnetic and exhibits high weldability and intergranular corrosion resistance, particularly with multiple heating. Chung Metal offers 347 rods in hot-rolled or cold-drawn conditions with different finishes.
| Grade | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Ni | Nb |
| 347 | 0.08 | 2.0 | 0.045 | 0.03 | 0.75 | 17.0-19.0 | 9.0-13.0 | 10*C-1.0 |
| Grade | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) | Hardness, HB（max） |
| 347 | 75【515】 | 30【205】 | 40 | 201 |
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| 347 | 1.4550 | S34700 | SUS347 | 08Ch18N12B | X6CrNiNb18-10 |
Yes, Stainless Steel 347 round bars/rods can be used at high temperatures up to 870°C, offering excellent resistance to oxidation, intergranular corrosion, and thermal stability in demanding environments.
347 round rods are applied to boilers, chemical tanks, heat exchangers, refineries, pressure vessels, and furnace parts. The thermal resistance of the material makes it ideal for aerospace, petrochemical, and power generation applications. It is also used in engine manifolds, expansion joints, and superheaters, where perpetual exposure to intense heat and stress is prevalent. Welded systems are benefited by its stabilization against carbide precipitation. Chung Metal supplies SS 347 round bars in specially customized lengths and tolerances for supporting accurate engineering applications in challenging high-temperature and corrosive environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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