Louis Metals is a trustworthy producer and supplier of Stainless Steel 321H Rectangular Bars in Houston, USA, exporting high-performance stainless steel bars designed for high-temperature and high-pressure applications. Renowned for outstanding quality and accuracy, Louis Metals fabricates SS 321H rectangular bars from premium-grade raw materials and latest manufacturing techniques. These bars provide greater strength, excellent resistance against intergranular corrosion, and stability under long-term exposure to heat. Stainless Steel 321H rectangular bars are suitable for application in power generation, chemical processing, aerospace, and petrochemical industries where high durability, heat resistance, and weldability become essential for long-term service.
Stainless Steel 321H Rectangular Bars are austenitic stainless steels, high-carbon, titanium-stabilized, which consist of Chromium (17–19%), Nickel (9–12%), and Titanium with added Carbon content (up to 0.10%) for enhanced high-temperature strength. These bars show a tensile strength of 515–750 MPa and yield strength of about 205 MPa, with good creep and stress rupture resistance. SS 321H has good ductility and is non-magnetic in the annealed state. It has better resistance to oxidation and intergranular corrosion in high-temperature environments and is weldable and resistant to long-term exposure at elevated temperatures.
Standard : 321H / 1.4878
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: 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 % |
| Standard | SS 321H |
| UNS | S32109 |
| WERKSTOFF NR. / DIN | 1.4878 |
Stainless Steel 321H Rectangular Bars find extensive use in processes that require long-term exposure to elevated temperatures and harsh mechanical strength. A few typical applications include reheater and superheater tubes, heat exchangers, furnace and boiler parts, parts of furnaces and boilers, exhaust manifolds, and steam lines for high-pressure usage. In the petrochemical and power sectors, Stainless Steel 321H Rectangular Bars are best suited for pressure vessels and structural components that run under thermal stress. SS 321H’s thermal stability and corrosion resistance also render it applicable to chemical processing equipment, refineries, and aerospace parts. Its weldability and strength make it a reliable option for high-performance fabrication projects.
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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