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Wai Nickel Alloys, a reputable manufacturer and supplier located in Naypyidaw, Myanmar, is dedicated to crafting top-notch Duplex Steel S31803 Flanges that blend strength, durability, and resistance to corrosion. These flanges are designed to excel in tough environments like chemical processing, marine, and offshore industries. Thanks to cutting-edge manufacturing methods and rigorous quality checks, Wai Nickel Alloys guarantees that every flange adheres to international standards, providing outstanding dimensional accuracy and mechanical reliability for essential piping and pressure systems.
Constructed from a well-balanced austenitic-ferritic microstructure, Duplex Steel S31803 Flanges boast double the strength of standard stainless steels. The alloy features around 22% chromium, 5–6% nickel, 3% molybdenum, and a touch of nitrogen, which boosts resistance to pitting, crevice corrosion, and stress corrosion cracking. These flanges are known for their high tensile and yield strength, good weldability, and remarkable resistance to oxidation, even at higher temperatures. Their sturdy metallurgical structure guarantees durability and stability in corrosive and high-pressure settings.
| Specifications | ASTM A182 / ASME SA182 |
| Size | 1/8″ NB TO 48″ NB |
| Standards | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| 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 |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
At Wai Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Flanges in Naypyidaw, Myanmar, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Myanmar, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel S31803 Flanges find extensive use in sectors like oil and gas, petrochemical, desalination, power generation, and marine engineering. They are perfect for connecting pipes, valves, and pumps in systems that deal with corrosive fluids, acids, and saline water. Their impressive mechanical strength and resistance to chloride-induced corrosion make them a go-to choice for offshore platforms, heat exchangers, and chemical reactors. With exceptional reliability and a long service life, Duplex Steel S31803 Flanges ensure safe and efficient operations in even the most demanding industrial applications.