Ojas Pipes and Tubes, based in Kolkata, India, stands out as a top manufacturer and supplier of premium Stainless Steel 321H Square Bars and Rods. These bars are celebrated for their remarkable strength, resistance to high-temperature oxidation, and outstanding weldability. Tailored for high-temperature applications, SS 321H is a stabilized austenitic stainless steel that boasts a higher carbon content. Ojas offers square bars in a variety of sizes, cut lengths, and surface finishes, serving industries like petrochemicals, heat exchangers, and refineries. With a commitment to strict quality control, timely delivery, and competitive pricing, Ojas has earned its reputation as a reliable name in stainless steel products.
Stainless Steel 321H Square Bars and Rods are an austenitic stainless steel grade that’s stabilized with titanium, featuring 17–19% chromium, 9–12% nickel, and an increased carbon content (up to 0.10%) for enhanced high-temperature strength. This alloy effectively resists intergranular corrosion after welding or exposure to elevated temperatures. It provides a tensile strength of around 515 MPa, a yield strength of approximately 205 MPa, and an elongation of about 35%. These characteristics make SS 321H ideal for structural components that operate in high-temperature environments, particularly where welding is involved.
Stainless Steel 321H Square Bars Specification :
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 321H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| Grade | Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elong (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321H | 515 | 205 | 40 | 95 | 217 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321H | 1.4438 | S32109 |
| SQUARES | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.62 | 2.05 |
| 18 | 0.79 | 2.59 |
| 20 | 0.76 | 2.49 |
| 22 | 1.18 | 3.87 |
| 25 | 1.52 | 5.00 |
| 28 | 1.91 | 6.27 |
| 30 | 2.19 | 7.20 |
| 32 | 2.50 | 8.19 |
| 36 | 3.16 | 10.37 |
| 38 | 3.52 | 11.55 |
| 40 | 3.90 | 12.80 |
| 45 | 4.94 | 16.20 |
| 50 | 6.10 | 20.00 |
| 56 | 7.65 | 25.08 |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
Yes, Stainless Steel 321H Square Bars are highly corrosion-resistant due to the addition of titanium, which helps prevent sensitization in high-temperature environments. They are ideal for applications in corrosive environments, offering excellent durability.
Stainless Steel 321H Square Rods offer excellent resistance to high-temperature oxidation, excellent weldability, and exceptional strength at elevated temperatures. They are ideal for applications in the chemical, petrochemical, and power generation industries.
Yes, Stainless Steel 321H Square Bars can be customized in size and length to meet specific requirements. Customization options are available based on customer needs for various applications.
Stainless Steel 321H Square Bars and Rods find their place in heat exchangers, boiler components, exhaust manifolds, refinery equipment, and chemical processing units. Thanks to their excellent resistance to oxidation and creep strength at high temperatures, they are perfect for furnace parts, expansion joints, and thermal oxidizers. The aerospace and marine industries also depend on 321H for structural and high-heat applications. These bars are favored in sectors where high carbon content is vital for preserving mechanical properties during continuous high-temperature operations and where resistance to stress corrosion cracking is essential.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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