Louis Metals is a top-notch stainless steel manufacturer and supplier located in Houston, USA. We specialize in premium-grade Stainless Steel 321H Bars and Rods, perfect for high-temperature and high-pressure applications. The 321H variant is a high-carbon version of 321 stainless steel, enhanced with titanium to provide excellent resistance to intergranular corrosion, especially after welding or when exposed to high temperatures. Our 321H bars and rods are crafted to meet strict ASTM and ASME standards, making them a go-to choice for heat exchangers, boilers, exhaust systems, and pressure vessels. At Louis Metals, we deliver durable, precisely machined 321H bars in various sizes, ensuring reliability in demanding industrial settings.
Stainless Steel 321H Bars and Rods consist of 17–19% chromium and 9–12% nickel, with titanium added (at least five times the carbon content) to prevent carbide precipitation. Thanks to its higher carbon content (0.04–0.10%), 321H boasts improved creep strength and durability at elevated temperatures. This alloy offers a tensile strength ranging from 515 to 750 MPa, a yield strength of about 205 MPa, and a Brinell hardness of approximately 150–200 HB. 321H maintains its structural integrity in environments up to 900°C (1650°F), providing excellent weldability and corrosion resistance, particularly in high-temperature industrial applications.
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Standards |
ASTM A276, A479, A582, GB4226-84, GB/T1220-2007, JISG4311-91, JIS G4318-98, EN 10095-99, GB4226-84, EN10088-3-2005, JIS G4303-2005, etc |
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Stainless Steel Round Bar type |
ASTM A276 321h stainless steel round bars |
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Range |
Range – 3.17mm to 350mm dia |
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Technique |
Forged/Hot Rolled/Cold Drawn/Peeled |
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Diameter |
2.0-400mm |
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Surface |
bright round bar, pickled round bar, black round bar |
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Length |
3000mm, 6000mm or according to the customer’s requirement. |
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Type |
Round bar, rod, square bar, flat bar, hexagon bar, angle bar, channel bar, threaded bar |
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Package Details |
Standard seaworthy package(wooden boxes package,pvc package, or other package) |
| Grade | C | Mn | Si | P | S | Cr | Ti | Ni | N |
| SS 321h | 0.04 – 0.10 max | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 – 19 | 4xC min 0.60% max | 9 – 12 | 0.10 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 | JIS | BS | GOST | AFNOR | EN |
| SS 321h | 1.4541 | S32109 | SUS 321h | – | – | – | X6CrNiTi18-10 |
Stainless Steel 321H Bars and Rods are perfect for applications that demand outstanding performance under heat, pressure, and corrosive conditions. They find extensive use in industries like power generation, aerospace, chemical processing, oil & gas, and marine engineering. Common applications include heat exchanger tubes, superheater tubes, expansion joints, high-temperature piping, exhaust systems, and furnace components. With its titanium stabilization and high carbon content, 321H excels in continuous service environments above 800°F (427°C). Louis Metals proudly offers 321H bars and rods tailored to meet the needs of various industrial applications.
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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