Zain Fittings, located in Surabaya, Indonesia, has built a solid reputation as a reliable manufacturer and supplier of top-notch **Duplex Steel Forged Fittings**. Known for their remarkable strength, resistance to corrosion, and long-lasting durability, these fittings are crafted to meet international standards, ensuring they perform well even in the toughest industrial settings. The team at Zain Fittings utilizes cutting-edge forging techniques and strict quality control measures to guarantee precise dimensions, outstanding mechanical properties, and extended service life. They cater to various industries, including oil and gas, petrochemical, marine, and power generation, providing Duplex Steel Forged Fittings that are essential for critical applications where reliability, safety, and efficiency are paramount.
| Standards | ASTM A182 / ASME SA182 |
| Specifications | ASME B16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size Range | NPS 1/8″- 4″ (DN 6~100) |
| Rating Pressure | Threaded End – 2000/3000/6000 LBS. Socket weld End – 3000/6000/9000 LBS. |
| Type | Socket Weld, Screwed, BSP Threaded & NPT Threaded |
Duplex Steel Forged Fittings are made from a combination of austenitic and ferritic stainless steels, typically containing 22-25% chromium, 4.5-6.5% nickel, 3-5% molybdenum, along with small amounts of nitrogen, manganese, and silicon. This unique composition provides superior corrosion resistance, particularly in chloride-rich environments, and enhances strength. Mechanically, these fittings offer a tensile strength of 620-750 MPa, yield strength of 450 MPa, and approximately 25% elongation. They also exhibit excellent fatigue resistance and high toughness, making them ideal for high-pressure and corrosive applications in various industries.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
These fittings boast a well-balanced microstructure of austenite and ferrite, which gives them high strength and excellent corrosion resistance. Typically, their composition includes chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), along with nitrogen, manganese, silicon, and iron as the primary element. In terms of mechanical properties, these fittings offer a tensile strength of about 620 MPa, a yield strength of 450 MPa, and an elongation of 25%. They also excel in resisting pitting, crevice corrosion, and stress corrosion cracking, while providing good weldability, toughness, and fatigue strength even in harsh operating conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Duplex Steel Forged Fittings from Zain Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Duplex Steel Forged Fittings offer several advantages, including exceptional corrosion resistance, particularly in chloride environments, making them ideal for industries like oil and gas, marine, and chemical processing. Their unique composition of austenitic and ferritic steels provides high strength, excellent resistance to stress corrosion cracking, and superior fatigue resistance. These fittings also offer excellent weldability and formability, allowing easy installation. With impressive toughness, even at low temperatures, Duplex Steel Forged Fittings are durable, reliable, and capable of withstanding high-pressure and high-temperature conditions, ensuring long-lasting performance and minimal maintenance.
Yes, custom sizes for Duplex Steel Forged Fittings are available at Zain Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@zainfittings.id.
| STANDARD | UNS | |
| Duplex Steel Forged Fittings | S31803 / S32205 |
| DN-NPT | MAJOR DIAMETER MM | TAPPING /DRILL SIZE MM | TPI | PITCH MM |
|---|---|---|---|---|
| 1/16″ | 7.895 | 6.00 | 27 | 0.941 |
| 1/8″ | 10.242 | 8.25 | 27 | 0.941 |
| 1/4″ | 13.616 | 10.70 | 18 | 1.411 |
| 3/8″ | 17.055 | 14.10 | 18 | 1.411 |
| 1/2″ | 21.223 | 17.40 | 14 | 1.814 |
| 3/4″ | 26.568 | 22.60 | 14 | 1.814 |
| 1″ | 33.228 | 28.50 | 11.5 | 2.209 |
| 1¼” | 41.985 | 37.00 | 11.5 | 2.209 |
| 1½” | 48.054 | 43.50 | 11.5 | 2.209 |
| 2″ | 60.092 | 55.00 | 11.5 | 2.209 |
| 2½” | 72.699 | 65.50 | 8 | 3.175 |
| 3″ | 88.608 | 81.50 | 8 | 3.175 |
| 3½” | 101.316 | 94.30 | 8 | 3.175 |
| 4″ | 113.973 | 107.00 | 8 | 3.175 |
| 5″ | 141.300 | 134.384 | 8 | 3.175 |
| 6″ | 168.275 | 161.191 | 8 | 3.175 |
| 8″ | 219.075 | 211.673 | 8 | 3.175 |
| 10″ | 273.050 | 265.311 | 8 | 3.175 |
| 12″ | 323.850 | 315.793 | 8 | 3.175 |
| Description | Class Designation | ||
|---|---|---|---|
| 3000 | 6000 | 9000 | |
| Elbows 45 and 90 degrees, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps | 1/2 – 4 | 1/2 – 2 | 1/2 – 2 |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| Pipe Size by Wall Thickness | SCH 80 / XS | SCH 160 | XXS |
Duplex Steel Forged Fittings find extensive use in industries where high mechanical strength and corrosion resistance are crucial. Their applications range from offshore oil and gas installations to chemical processing plants, desalination units, refineries, heat exchangers, and marine piping systems. They are also ideal for pipelines, pressure vessels, and other critical fluid handling systems that face exposure to chlorides and high-pressure environments. With their impressive durability, long service life, and resistance to aggressive media, these fittings are the perfect choice for demanding industrial and marine applications.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
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