Machuca Fittings, based in Kuala Lumpur, Malaysia, has earned a solid reputation as a reliable manufacturer and supplier of Duplex Steel Forged Fittings. They specialize in delivering high-quality, corrosion-resistant, and durable solutions tailored for tough industrial applications. Their impressive lineup features forged elbows, tees, couplings, unions, and plugs, all meticulously engineered to guarantee leak-proof connections, robust mechanical strength, and lasting reliability. Thanks to their unique austenitic-ferritic microstructure, Duplex steels provide outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, all while boasting superior tensile and yield strength. Machuca Fittings is committed to ensuring that their Duplex Steel forged fittings comply with international standards, catering to industries such as chemical, petrochemical, marine, oil & gas, and power generation.
| 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 |
These Duplex Steel Forged Fittings are made up of 22–25% chromium, 4–6% nickel, 3–5% molybdenum, along with trace amounts of nitrogen, manganese, silicon, and carbon. This specific blend grants them remarkable mechanical strength, corrosion resistance, and toughness, even in high-pressure, high-temperature, and chemically aggressive settings. The dual-phase structure not only enhances weldability and ductility but also ensures thermal stability, making them a reliable choice for critical industrial applications.
| 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 |
Machuca Fittings is a leading supplier of Duplex Steel Forged Fittings in Kuala lumpur, Malaysia. We offer an extensive range of Duplex Steel Forged Fittings, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
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 Machuca 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 Machuca Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@machucafittings.com.
| 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 their place in various industries that demand both mechanical integrity and corrosion resistance. In chemical and petrochemical facilities, they are commonly used in pipelines that transport acids, alkalis, chlorides, and other corrosive substances. The oil and gas sector relies on them for refineries, offshore platforms, and subsea piping systems. Their resistance to seawater and biofouling makes them a great fit for marine applications. Additionally, power generation plants utilize these fittings in heat exchangers, boilers, and high-temperature piping systems. With their blend of mechanical strength, durability, and corrosion resistance, Duplex Steel Forged Fittings are perfectly suited for the most challenging industrial environments.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
©2024 Machuca Fittings. All Rights Reserved.
