- sales@ojaspipesandtubes.co.in
- Kolkata, Kolkata
Home > Super Duplex Steel > Super Duplex Steel Boiler Tubing
One of the top producers and suppliers of Super Duplex Steel Boiler Tubing, Ojas Pipes and Tubes is based in Delhi, India, and is well-known for providing high-performance, premium tubing solutions for high-temperature and high-pressure settings. Ojas provides boiler tubing that is engineered to meet strict international standards, supported by years of industry experience and cutting-edge manufacturing capabilities. Their Super Duplex boiler tubes combine strength, durability, and remarkable resistance to oxidation and corrosion, making them perfect for demanding thermal and corrosive applications. Serving a variety of industries, Ojas guarantees prompt delivery, affordable prices, and top-notch customer satisfaction both in India and abroad.
Super Duplex Steel Boiler Tubing has a dual-phase (austenitic-ferritic) microstructure and is made up of roughly 24–26% chromium, 6–8% nickel, and 3–5% molybdenum in addition to nitrogen, manganese, and iron. Increased strength and resistance to pitting, stress corrosion cracking, and crevice corrosion are provided by this composition. Excellent impact toughness, a yield strength of about 550 MPa, and a tensile strength of 800–850 MPa are typical mechanical characteristics. Super Duplex boiler tubing is perfect for boiler systems running in harsh and corrosive industrial environments because it retains mechanical integrity under extreme pressure and thermal cycling conditions.
| Specifications | ASTM A789 ASME SA789 |
| Dimensions | ASTM, ASME and API |
| Tube Size | 1/2″NB TO 12 “NB IN |
| Specialized in | Large Diameter Size |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Fire Boiler Tubing/ Hot Rolled Boiler Tube/ Heat Expansion Boiler Tube/ IBR Seamless Boiler Tubes |
| Material | Super Duplex Steel |
|---|---|
| Carbon (C) Max. | 0.030 |
| Manganese (Mn) Max. | 1.20 |
| Phosphorous (P) Max. | 0.035 |
| Sulphur (S) Max. | 0.020 |
| Silicon (Si) Max. | 0.80 |
| Chromium (Cr) | 24.0–26.0 |
| Nickel (Ni) | 6.0–8.0 |
| Molybdenum (Mo) | 3.0–5.0 |
| Nitrogen (N) | 0.24–0.32 |
| Iron (Fe) | Bal. |
| Copper (Cu) | 0.50 |
| Other Elements | — |
| Tensile Strength | Yield Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 in. (min.) % | Grain Size Req. | Max. Hardness | Modulus of Elasticity (x106psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Thermal Conductivity (BTU-in/ ft2-h-°F) |
| Super Duplex | – | A789, A790 | 100,000 | 690 | 100 | 70,000 | 485 | 70 | 20 | — | 30.5 Rc | — | — | — |
| Super Duplex | – | A789, A790 | 116,000 | 800 | 116 | 80,000 | 550 | 80 | 15 | — | 32 Rc | 27.5 | 7.2 | |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Super Duplex Steel Boiler Tubing from Ojas Pipes and Tubes ensures superior quality and durability, offering outstanding corrosion resistance and high strength. Our dedication to delivering exceptional service and reliable products guarantees customer satisfaction across a wide range of industrial applications. With our expertise in Duplex steel solutions, you can trust us to provide a top-tier, customized piping solution that meets your specific requirements.
Ojas Pipes and Tubes, one of the largest suppliers of Super Duplex Steel Boiler Tubing in the Kolkatas, India. Offers a wide range of high-quality pipes and tubes designed for various industrial applications. Their extensive inventory and dedication to exceptional service make them a trusted choice for Super Duplex steel products in the region, delivering reliable solutions to meet diverse project requirements.
Yes, we provide custom sizes for Super Duplex Steel Boiler Tubing to meet your specific requirements. At Ojas Pipes and Tubes, our team is dedicated to delivering tailored solutions for all your piping and tubing needs. For more information, please contact us at sales@ojaspipesandtubes.co.in.
Industries that require high strength, thermal stability, and exceptional corrosion resistance frequently use super duplex steel boiler tubing. It is perfect for superheaters, heat exchangers, and high-pressure boilers in the power generation industry. It is used for boiler systems exposed to corrosive gases and liquids in the petrochemical and chemical industries. It is utilised in boilers and condensers that function in saline and chloride-rich environments in the maritime and offshore industries. Additionally, pulp and paper mills, refineries, and waste-to-energy facilities use it. Even under the most taxing operating circumstances, these tubes guarantee dependable performance and a long service life.
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