Louis Metals stands out as a top-notch stainless steel supplier and manufacturer based in Houston, USA. We proudly offer high-quality Stainless Steel 347H Round Bars and Rods, perfect for those demanding high-temperature and pressure applications. The 347H grade is a high-carbon, niobium-stabilized austenitic stainless steel, known for its remarkable resistance to intergranular corrosion and enhanced creep strength at elevated temperatures. Our round bars and rods are crafted to meet ASTM and ASME standards, making them a go-to choice in industries like power generation, petrochemical, and refinery operations. At Louis Metals, we provide precision-cut bars in various sizes, ensuring reliable performance, excellent weldability, and durability for even the toughest thermal and mechanical environments.
Stainless Steel 347H Round Bars and Rods are made up of 17–20% chromium, 9–13% nickel, and feature columbium (niobium) for stabilization, along with a higher carbon content (0.04–0.10%) that boosts strength at high temperatures. These bars deliver impressive tensile strength ranging from 515–750 MPa, a yield strength of about 205 MPa, and a Brinell hardness between 150–200 HB. The 347H grade is known for its outstanding resistance to oxidation, intergranular corrosion, and thermal fatigue. It retains its structural integrity and mechanical properties even in environments reaching up to 900°C (1652°F), making it an excellent choice for welded components that face high heat over time.
Stainless Steel Round Bar Specification : ASTM A276 / A479, ASME SA276 / A479
Dimension Standard : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 14mm-300mm
Thickness : 50 mm to 6000 mm Long
Length : 1 To 6 Meters, Custom Cut Length
Form : Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc.
| Grade | C | Mn | Si | P | S | Cr | Ni | Ti |
| 347H | 0.04 – 0.10 | 2.00 max. | 0.75 max. | 0.045 max. | 0.03 max. | 17.0 – 19.0 | 9.0-13.0 | 8 x C min. |
| (1.00 max.) |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 347H | 1.4961 | S34709 |
Stainless Steel 347H Round Bars and Rods find their place in a variety of applications that demand high creep resistance, corrosion protection, and mechanical stability under elevated temperatures. You’ll commonly see them in boiler tubes, superheaters, heat exchangers, furnace components, and high-temperature piping systems within chemical plants, refineries, and power stations. Thanks to its superb weldability and resistance to carbide precipitation, 347H is perfect for welded pressure vessels and heat-resistant structural components. Louis Metals is here to supply you with the best in the business!
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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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