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Home > Stainless Steel > Stainless Steel 321/321H Heat Exchanger Tubing
Maria Pipes and Tubes, Malaysia, is a reputable manufacturer and supplier of Stainless Steel 321/321H Heat Exchanger Tubing. We are known for our quality and performance and supply heat exchanger tubes to perform under corrosive conditions and high temperature. Our tubing in Stainless Steel 321 and 321H is made using state-of-the-art manufacturing processes and with stringent quality control to provide durability, resistance to oxidation, and a long service life. Overspread across thermal and chemical processing industries, these tubes are to international standards and suited best for applications having regular temperature shifts and high-pressure heat exchange systems.
Stainless Steel 321/321H Heat Exchanger Tubing is 9–13% nickel and 17–20% chromium, to which titanium is added for stabilizing the alloy and avoiding intergranular corrosion. Grade 321H contains more carbon than 321 and provides better creep resistance and high-temperature strength. These tubes have a tensile strength of approximately 485 MPa, a yield strength of 170 MPa, and elongation of 35%. Their superior resistance to oxidation and scaling at temperatures of 900°C and above, along with favorable mechanical properties, render them perfect for application in heat exchangers, particularly under high-heat and pressure conditions.
Range : 10 mm OD to 50.8 mm OD
Outer Diameter : 6.00 mm to 101.60 mm
Wall Thickness : 0.70 mm to 8.00 mm
Length : up to 20 m (65.62 ft) Length & Customed Required Length
Specifications : ASTM A 213, A 268, A 269, A 789, Equivalent to ASME, EN, JIS Etc.
| Element | SS 321 | SS 321H |
| C | 0.08 max | 0.04 – 0.10 |
| Mn | 2.0 max | 2.0 max |
| Si | 1.0 max | 1.0 max |
| P | 0.045 max | 0.045 max |
| S | 0.030 max | 0.030 max |
| Cr | 17.00 – 19.00 | 17.00 – 19.00 |
| N | 0.10 max | 0.10 max |
| Ni | 9.00 – 12.00 | 9.00 – 12.00 |
| Ti | 5(C+N) – 0.70 max | 4(C+N) – 0.70 max |
| Element | SS 321/321H |
| Density | 8.0 g/cm3 |
| Melting Point | 1457 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35 % |
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 321/321H Heat Exchanger Tubing from Maria Pipes and Tubes ensures high quality and reliability for your industrial applications. Our tubing is manufactured using premium-grade materials, adhering to strict industry standards, which guarantees durability and performance. We offer customized solutions to meet specific requirements, backed by exceptional customer service and technical support. With our extensive inventory and prompt delivery, you can count on us for timely project execution. Trust Maria Pipes and Tubes for superior stainless steel products that enhance efficiency and longevity in heat exchange systems.
Maria Pipes and Tubes, one of the largest suppliers of Stainless Steel 321/321H Heat Exchanger Tubing in Kuala lumpur, Malaysia, 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.
Yes, we offer custom sizes for Stainless Steel 321/321H Heat Exchanger Tubing to meet your specific requirements. Our team at Maria Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@mariapipes.com.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
321/321H Stainless Steel Heat Exchanger Tubing finds extensive application in the petrochemical, power generation, aerospace, and chemical processing industries. These tubes are specifically designed for superheaters, boiler parts, and exhaust systems running under high temperatures and corrosive environments. The titanium stabilization in 321 avoids precipitation of carbides during welding, while 321H’s slightly higher carbon content gives them greater strength for applications at elevated temperatures. Their high thermal stability, oxidation resistance, and structural integrity make them the choice for long-term service in applications with continuous heat cycles and aggressive media.
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