Louis Metals is a reliable Stainless Steel 347 Rectangular Bars manufacturer and supplier in Houston, USA, providing high-quality stainless steel solutions for high-performance and corrosion-resistant applications. With a track record for quality, accuracy, and timely delivery, Louis Metals produces SS 347 rectangular bars with high-grade raw materials and superior production methods. These rectangular bars are stabilized by niobium to avoid carbide precipitation, rendering them resistant to intergranular corrosion. Stainless Steel 347 rectangular bars are suitable for applications in chemical processing, power generation, and high-temperature applications where strength, weldability, and long-term durability are required.
Stainless Steel 347 Rectangular Bars are stabilized austenitic stainless steels containing mainly Chromium (17–20%), Nickel (9–13%), and Columbium (Niobium) with limited Carbon content (≤ 0.08%). This alloy possesses superior mechanical strength with a tensile strength of 515–750 MPa and yield strength around 205–275 MPa. It has good toughness and ductility, even at cryogenic temperatures, and resists intergranular corrosion following welding. SS 347 has good oxidation resistance and is suitable for high temperature service owing to its high creep and stress rupture characteristics over unstabilized grades.
| 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 |
Rectangular Bars of Stainless Steel 347 find wide usage in applications demanding resistance to high temperatures, corrosion, and repeated thermal cycling. Typical uses comprise furnace components, boiler shells, heat exchangers, superheaters, and exhaust manifolds. In petrochemical, chemical, and food processing industries, SS 347 finds application in welded equipment, reactor vessels, and piping systems requiring resistance to carbide precipitation. The bars are equally suitable for aerospace and marine components facing harsh operating conditions. Their high weldability and long life of service make them the choice of fabrications subjected to high mechanical as well as thermal stress.






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Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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