Grant Fittings is a leading manufacturer and supplier based in Manila, Philippines, specializing in high-quality piping solutions for diverse industrial applications. With a strong commitment to precision and reliability, we offer a wide range of fittings, including Duplex Steel S31803 Pipe Fittings. Renowned for their excellent corrosion resistance, high strength, and durability, our Duplex Steel S31803 fittings are ideal for demanding environments such as the chemical, marine, and oil and gas industries. We ensure superior performance and long-lasting reliability in every product.
Specifications ASTM A815 / ASME SA815
Dimensions ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size 1/2″ NB to 24″NB in
Type Seamless / Welded / Fabricated
Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
Duplex Steel S31803 Pipe Fittings are made from a balanced mix of austenitic and ferritic stainless steel. The composition typically includes 21-23% chromium, 4.5-6.5% nickel, 2.5-3.5% molybdenum, and trace elements of nitrogen, manganese, and carbon. This composition provides high strength and excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Mechanical properties include a tensile strength of 620 MPa, yield strength of 450 MPa, and an elongation of 25%. Duplex Steel S31803 offers superior weldability, toughness, and high resistance to corrosion in various industrial environments.
| 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 |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| S31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Grant Fittings stands out as a top-notch manufacturer and supplier of Duplex Steel S31803 Pipe Fittings right in the heart of Manila, Philippines. They’re well-regarded for their high-quality offerings, which include elbows, tees, reducers, and caps, catering to various industries such as oil and gas, chemical processing, marine, and power generation. Each fitting is crafted to meet the stringent ASTM A815 and ASME B16.9 standards, ensuring they boast impressive durability, corrosion resistance, and mechanical strength. With cutting-edge production methods and a commitment to quality control, Grant Fittings delivers reliable piping components that excel in tough environments and high-pressure situations throughout the Philippines.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex 2205 | S31803 | 1.4462 |
The Duplex Steel S31803 pipe fittings are crafted from a well-balanced austenitic-ferritic stainless steel alloy, typically featuring 22% chromium, 5-6% nickel, and 3% molybdenum. This unique blend provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in environments rich in chlorides. With a high tensile strength of around 620 MPa and remarkable toughness, these fittings are perfect for demanding industrial applications. Grant Fittings ensures that every piece is manufactured with strict adherence to international standards, guaranteeing optimal weldability, mechanical performance, and a long-lasting service life.
Duplex Steel S31803 pipe fittings offer exceptional corrosion resistance, particularly against pitting, crevice corrosion, and stress corrosion cracking, making them ideal for harsh environments. They provide high strength and excellent resistance to fatigue, making them durable under pressure. The alloy’s good weldability and formability enhance the ease of fabrication. Duplex Steel S31803 pipe fittings also offer superior toughness and stress resistance, ensuring reliability in demanding applications such as chemical processing, marine, and oil & gas industries. Their cost-effectiveness and long-lasting performance make them a preferred choice for critical piping systems.
| Outer Diameter And Inside Diameter | Equivalent | Diameter Of Pipe Nominal | Typical Threads In Inches |
| 5/16 | 0.313 | 1/16 | 27 |
| 13/32 | 0.405 | 1/8 | 27 |
| 35/64 | 0.540 | 1/4 | 18 |
| 43/64 | 0.675 | 3/8 | 18 |
| 27/32 | 0.840 | 1/2 | 14 |
| 1-3/64 | 1.050 | 3/4 | 14 |
| 1-5/16 | 1.315 | 1 | 11-1/2 |
| 1-21/32 | 1.660 | 1-1/4 | 11-1/2 |
| 1-29/32 | 1.900 | 1-1/2 | 11-1/2 |
| 2-3/8 | 2.375 | 2 | 11-1/2 |
| 2-7/8 | 2.875 | 2-1/2 | 8 |
| 3-1/2 | 3.500 | 3 | 8 |
| 4 | 4.000 | 3-1/2 | 8 |
Yes, custom sizes for Duplex Steel S31803 Pipe Fittings are available at Grant Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@grantfittings.com.
The Duplex Steel S31803 pipe fittings from Grant Fittings are extensively utilized in offshore oil and gas platforms, chemical plants, desalination facilities, and power generation sectors. Their impressive corrosion resistance and mechanical durability make them the go-to choice for piping systems that face exposure to seawater, aggressive chemicals, and varying pressures. These fittings provide secure, leak-proof connections that minimize maintenance requirements and enhance operational safety.
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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