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Home > Stainless Steel > Stainless Steel 321 and 321H Seamless Pipes
Impex Tube India is a well-known producer and supplier of high–quality pipes and tubes from Mumbai, India, with a vast array of products such as Stainless Steel 321 and 321H Seamless Pipes. These pipes are made to adhere to strict industry standards to provide better strength, durability, and corrosion resistance. With a reputation for being of high quality and reliability, Impex Tube India serves a range of industries that need reliable piping solutions. The dedication to innovation and precision engineering of the company has made it a renowned name in providing seamless stainless steel piping products.
321 and 321H Seamless Pipes made of Stainless Steel are titanium-stabilized austenitic stainless steels having the main constituent 17–19% chromium and 9–12% nickel with titanium being added to increase resistance against intergranular corrosion. Higher carbon content (0.04–0.10%) for higher high-temperature strength is in Grade 321H. These grades provide superior mechanical properties, such as a tensile strength of around 515 MPa, yield strength of 205 MPa, and satisfactory elongation. They are structurally stable and resistant to scaling at high temperatures, thus being suitable for high-heat conditions while providing longevity and mechanical integrity.
Range : 6NB to 1200NB
Outer Diameter : 1/8″ NPS to 12″ NPS
Thickness : 0.6 mm to 12.7 mm
Schedules : SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS.
Length : Single Random, Double Random & Cut Length
Specifications : ASTM A312 / ASTM SA312
Types : Round, Square, Rectangle, Hydraulic, Honed Tubes
End : Plain End, Beveled End
| STANDARD | UNS | WERKSTOFF NR. |
| SS 321 | S32100 | 1.4541 |
| SS 321H | S32109 | 1.4878 |
| Ni | 09 – 12 | 09 – 12 |
| N | 0.10 | 0.10 |
| Cr | 17 – 19 | 17 – 19 |
| C | 0.08 max | 0.04 – 0.08 |
| Si | 1 max | 0.75 max |
| Mn | 2 max | 2 max |
| P | 0.040 max | 0.045 max |
| S | 0.030 max | 0.03 max |
| TI | 4(C+N) | 0.70 max |
| Grade | 321 | 321H |
| Tensile Strength (MPa) min | 515 | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 | 205 |
| Elongation (% in 50mm) min | 40 | 40 |
| Hardness | ||
| Rockwell B (HR B) max | 95 | 95 |
| Brinell (HB) max | 217 | 217 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 321 and 321H Seamless Pipes from Impex Tube India guarantees exceptional corrosion resistance and high temperature performance. Their pipes are manufactured to exacting standards, ensuring reliability and durability for complex applications. With a focus on customer service, Impex Tube India offers customized solutions and technical support. In addition, the rugged design reduces leakage, making it reliable for a variety of applications.
Impex Tube India, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes in Mumbai, India, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
| 321H | S32109 | 321S51 | – | 1.4878 | X6CrNiTi18-10 | – | SUS 321H |
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Yes, we offer custom sizes for Stainless Steel 321 and 321H Seamless Pipes to meet your specific requirements. Our team at Impex Tube India is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@impextubeind.com.
Stainless Steel 321 and 321H Seamless Pipes find extensive application in industries where high-temperature and corrosion resistance is essential. They are best used in heat exchangers, radiators, car exhausts, furnace components, chemical processing, and oxidizers. In the petroleum and gas sector, they find application in high-temperature piping systems and refinery machinery. They also find application in power plants, petrochemical plants, and food processing equipment. Their capacity to operate effectively in situations with frequent temperature changes renders them appropriate for cryogenic and high-heat uses, providing reliability and endurance in mission-critical operations.
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