Louis Metals exports Stainless Steel 446 Hollow Bars from Houston, USA, designed for high-temperature and oxidation-resistant uses. Grade 446 (UNS S44600) is a ferritic stainless steel possessing high chromium composition, which makes it suitable for heat-resistant structural parts. These hollow bars possess good thermal scaling resistance and reasonable corrosion resistance in oxidizing conditions. Fabricated to ASTM A511 and A268 standards, our 446 hollow bars can be made available in seamless and welded forms with smooth inner finishes. Louis Metals assists high-temperature industrial processes with robust, precision-machined 446 bars awaiting machining and fabrication in adverse service environments.
446 Hollow Bars consist of 23–27% chromium, with a very low carbon content (<0.20%) and trace molybdenum, silicon, and manganese contents. They provide moderate tensile strength (415–585 MPa) and satisfactory creep resistance at high temperatures. 446 is very resistant to oxidation, sulfidation, and heat cycling up to 1100°C. Ferritic structure provides good dimensional stability but reduced ductility over austenitic grades. Louis Metals produces 446 hollow bars with close tolerances and excellent thermal characteristics for furnace, heat treatment, and petrochemical use.
| Standard | ASTM A276 / A479, ASME SA276 / A479 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| 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 | Mo | Ni | N |
| SS 446 | 0.2 max | 1.5 max | 0.75 max | 0.040 max | 0.030 max | 23.0 – 11.5 | – | 0.50 | 0.25 – 0.10 |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.5 g/cm3 | 1510 °C (2750 °F) | Psi – 75,000 , MPa – 485 | Psi – 40,000 , MPa – 275 | 20 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS |
| SS 446 | 1.4762 / 3 | S44600 | SUS 446 |
|
Type |
SIZES (mm) |
SIZES (Inches) |
ISO Tolerance |
|
Cold Drawn and Polish |
3.00 – 75.00 |
1/8 – 3.00 |
h8-h9-h10-h11 |
|
Cold Drawn and Ground |
10.00 – 75.00 |
5/6 – 2.50 |
h8-h9-h10-h11 |
|
Peeled and Polished |
40.00 – 150.00 |
1.50 – 6.00 |
h11, h11-DIN 1013 |
|
Peeled and Ground |
20.00 – 50.00 |
3/4 – 2.00 |
h9-h10-h11 |
SS 446 hollow bars typically contain 23-27% chromium, 1-2% silicon, 0.75% manganese, and small amounts of carbon, phosphorus, sulfur, and nickel, providing excellent resistance to high-temperature oxidation and corrosion.
Key benefits of SS 446 hollow bars include excellent high-temperature oxidation resistance, superior corrosion resistance, durability in harsh environments, and strength at elevated temperatures, making them ideal for furnace and chemical processing applications.
446 Stainless Steel Hollow Bars find applications in furnace liners, burner tubes, heat exchanger components, and radiant tubes in high-temperature service. They are used extensively in petrochemical facilities, power plants, incinerators, and metallurgical furnaces because of their resistance to oxidation and scaling. In the chemical process industry, 446 hollow bars are used in exhaust systems, reformer tubes, and thermal cycling-exposed heat shields in contact with corrosive gases. Louis Metals supplies these bars in lengths and thickness of customer specifications, with outstanding resistance against oxidation as well as consistent performance when exposed to heat over a long period.
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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