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Fajar Metals stands out as a trusted manufacturer and supplier of Duplex Steel Flanges, proudly rooted in Jakarta, Indonesia. Known for providing robust, corrosion-resistant flange solutions, the company serves demanding sectors like oil & gas, petrochemical, marine, and power generation. By blending cutting-edge manufacturing techniques with rigorous quality control, Fajar Metals ensures that its flanges meet international standards such as ASTM, ASME, and DIN. Built to excel in extreme conditions, their Duplex Steel Flanges guarantee dependable, leak-proof connections in piping systems that face high pressure, harsh chemicals, and seawater. Every product reflects a commitment to customer satisfaction, quality, and precision.
Duplex Steel Flanges are typically crafted from UNS S31803 or S32205 grades, showcasing a unique dual-phase microstructure of austenite and ferrite. Their makeup consists of 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, and nitrogen, with iron making up the rest. This blend provides exceptional corrosion resistance and mechanical performance. With a tensile strength ranging from 620–880 MPa and a yield strength of about 450 MPa, these flanges also exhibit good elongation and impact resistance. They are particularly adept at resisting stress corrosion cracking, pitting, and crevice corrosion, making them perfect for harsh and corrosive environments.
| 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 | Duplex Steel Flanges |
|---|---|
| C | 0.030 max |
| Mn | 2.00 max |
| Si | 1.00 max |
| P | 0.030 max |
| S | 0.020 max |
| Cr | 22.0 – 23.0 |
| Mo | 3.0 – 3.5 |
| Ni | 4.50 – 6.50 |
| N | 0.14 – 0.20 |
| Fe | 63.72 min |
| Duplex Steel | Flanges |
|---|---|
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669 |
At Fajar Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Flanges in Jakarta, Indonesia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Indonesia, 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 Flanges find their place in crucial piping systems across various industries where high mechanical strength and corrosion resistance are non-negotiable. In the oil and gas sector, they play a key role in both offshore and onshore pipeline connections, pressure vessels, and processing units. The chemical and petrochemical industries rely on them for transporting acids and solvents. Additionally, their durability in saltwater makes them invaluable in marine and shipbuilding applications.