Stainless Steel 321 Rectangular Bars are highly regarded for their outstanding resistance to corrosion, impressive strength at high temperatures, and overall durability, making them perfect for tough industrial and engineering tasks. This austenitic stainless steel, which is stabilized with titanium, effectively resists intergranular corrosion and keeps its structural integrity even when exposed to elevated temperatures. These rectangular bars boast consistent dimensional accuracy, a superior surface finish, and dependable mechanical performance, making them a go-to choice for aerospace components, chemical processing equipment, and high-temperature machinery. With their long service life, high strength, and resistance to corrosion, Stainless Steel 321 Rectangular Bars are trusted by industries that demand reliable performance in challenging environments.
The composition of Stainless Steel 321 Rectangular Bars primarily includes iron, along with 17–19% chromium, 9–12% nickel, and titanium, which helps stabilize the structure. This blend results in excellent mechanical properties, such as good tensile strength, ductility, and resistance to oxidation at high temperatures. Grade 321 maintains its corrosion resistance in both oxidizing and mildly reducing environments, making it suitable for applications in chemical, marine, and high-temperature settings. The titanium stabilization also prevents chromium carbide from forming during welding or extended heat exposure, ensuring dimensional stability and long-lasting performance. These bars are perfect for precision fabrication and industrial components that require both durability and reliability.
| Grade | Ti | Mn | C | Si | S | P | Mo | Cr | Ni |
| SS 321 | 5(C+N) to 0.70 maximum | 2.0 maximum | 0.08 maximum | 1.0 maximum | 0.030 maximum | 0.045 maximum | – | 17.00 to 19.00 | 9.00 to 12.00 |
| Melting Point | Density | (0.2%Offset) Yield Strength | Tensile Strength | Elongation |
| 1457 °C (2650 °F) | 8.0 g/cm3 | Psi – 30000 , MPa – 205 | Psi – 75000 , MPa – 515 | 35 % |
| WERKSTOFF NR. | STANDARD | JIS | UNS | EN |
| 1.4541 | SS 321 | SUS 321 | S32100 | X6CrNiTi18-10 |
Yes, Stainless Steel 321 Rectangular Bars can be welded. They offer good weldability, particularly with proper preheat and post-weld heat treatment to prevent carbide precipitation.
Stainless Steel 321 Rectangular Bars generally do not require additional corrosion protection coatings due to their inherent corrosion resistance. However, in harsh environments, extra coatings may be applied for enhanced protection.
Choose Stainless Steel 321 Rectangular Bars based on factors like strength, corrosion resistance, and temperature requirements of your application. Consider factors like weldability and environment exposure to ensure optimal performance.
Stainless Steel 321 Rectangular Bars find extensive use in aerospace, chemical processing, heat exchangers, furnace parts, and high-temperature structural components. Their ability to resist intergranular corrosion and oxidation makes them ideal for boilers, exhaust systems, chemical tanks, and pressure vessels. Additionally, these bars are commonly used in various industrial machinery and equipment.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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