Louis Metals, a reputable stainless steel manufacturer and supplier located in Houston, USA, proudly offers top-notch Stainless Steel 321H Round Bars and Rods, specifically crafted for high-temperature and pressure applications. Known for its high-carbon, titanium-stabilized austenitic structure, 321H boasts exceptional creep strength, stress rupture resistance, and stability under prolonged heat exposure. Our precision-engineered 321H bars and rods adhere to strict ASTM and ASME standards, making them a go-to choice in industries like thermal processing, chemical, petrochemical, and power generation. At Louis Metals, we deliver robust, weldable, and corrosion-resistant 321H products designed to meet the demanding needs of industrial engineering environments.
Stainless Steel 321H Round Bars and Rods are made up of 17–19% chromium, 9–12% nickel, and titanium (at least five times the carbon content), featuring a higher carbon level (0.04–0.10%) compared to standard 321. This elevated carbon content enhances strength at high temperatures, while titanium stabilization helps prevent intergranular corrosion. The alloy offers a tensile strength ranging from 515 to 750 MPa, a yield strength of about 205 MPa, and a Brinell hardness between 150 and 200 HB. 321H performs reliably at temperatures reaching up to 900°C (1650°F), providing excellent oxidation resistance, dimensional stability, and weldability—making it perfect for high-heat industrial applications.
Standard : 321H / 1.4878
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: Bar, Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length : Random, Fix & Cut Length
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Ti |
| 321H | 0.04 – 0.10 | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 – 19 | 3 – 4 | 9 – 12 | – | 4xC min 0.60% max |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000, MPa – 205 |
| Elongation | 35 % |
| Size (mm) | 10×10 | 12×12 | 16×16 | 20×20 | 25×25 | 32×32 | 40×40 | 50×50 |
|---|---|---|---|---|---|---|---|---|
| kg/m | 0.81 | 1.16 | 2.06 | 3.22 | 5.03 | 8.24 | 12.87 | 19.60 |
| Standard | SS 321H |
| UNS | S32109 |
| WERKSTOFF NR. / DIN | 1.4878 |
Stainless Steel 321H Round Bars and Rods find extensive use in industries that demand materials capable of enduring high temperatures and thermal cycling. Typical applications include heat exchangers, superheater tubes, exhaust systems, furnace components, refinery piping, and pressure vessels. The titanium-stabilized composition of 321H offers resistance to carbide precipitation, making it an excellent choice for welded parts exposed to prolonged thermal stress. It is widely utilized in the aerospace, petrochemical, and thermal processing sectors.
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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