ARK Stainless Inc. is a premier manufacturer and supplier of high-quality Duplex & Super Duplex Stainless Steel Flanges, designed to perform in the most demanding applications. Our flanges are crafted using advanced technology and premium raw materials, ensuring exceptional strength, excellent corrosion resistance, and superior performance even in challenging environments, such as high-pressure and chloride-rich conditions.
We specialize in Duplex Stainless Steel grades such as S31803 and S32205, and Super Duplex Stainless Steel grades including S32750 and S32760. These flanges are produced in strict adherence to international standards like ASTM A182, ASTM A105 and dimensional standards such as ASME B16.5, ASME B16.47, and MSS-SP-44, guaranteeing high-quality products that meet the most stringent requirements for various industrial applications.
The dual-phase microstructure of Duplex and Super Duplex Stainless Steel flanges provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. These materials make our flanges ideal for industries such as oil & gas, chemical processing, marine, offshore platforms, and desalination, where both strength and exceptional corrosion resistance are critical.
| Grade | Common Name | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% | Others |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S32750 | Super Duplex | 0.020 | - | - | - | - | 25 | 7 | 4.0 | 0.27 | S=0.001 |
| S32760 | Super Duplex | 0.020 | - | - | - | - | 25 | 7 | 4.0 | 0.27 | S=0.001 |
| S31803 | Duplex Steel | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 | - |
| S32205 | Duplex Steel | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | - |
| Property | Duplex Steel S31803/S32205 | Super Duplex Steel S32750/S32760 |
|---|---|---|
| Tensile Strength | 620 MPa min | 116 ksi min |
| Yield Strength | 450 MPa min | 80 ksi min (0.2% Offset) |
| Elastic Modulus | 200 GPa | - |
| Ultimate Tensile Strength | - | 116 ksi min |
| 0.2% Offset Yield Strength | - | 80 ksi min |
| 0.1% Offset Yield Strength | - | 91 ksi min |
| Elongation (2 inches) | - | 15% min |
| Hardness (Rockwell C) | - | 32 max |
| Impact Energy | - | 74 ft-lbs min |
| Density | 7,805 kg/m³ | - |
Duplex Steel S31803/S32205 Flanges are widely used in various industries including offshore oil drilling, aircraft exhaust manifolds, petrochemicals, power generation, gas processing, pharmaceuticals, specialty chemicals, pharmaceutical equipment, heat exchangers, and seawater equipment. These flanges are designed to meet the rigorous demands of these industries and are available in several designs such as slip-on, weld-neck, blind, threaded, lap joint, and socket weld. The Duplex Steel Flanges undergo a series of tests to ensure top quality and performance. These include intergranular corrosion (IGC) testing, pitting resistance testing, flaring test, micro and macro testing, flattening test, positive material identification (PMI) test, chemical analysis, hardness testing, and mechanical testing such as tensile tests. We provide comprehensive documentation including a quality assurance plan, MTC-En10204/3.1b, third-party test reports, and radiography test reports. For packaging, we take utmost care in ensuring that the material reaches customers in pristine condition. The Duplex Steel Flanges are securely packaged in wooden pallets and cases, preventing damage during delivery and maintaining customer trust.
| STANDARD | WNR. |
|---|---|
| Duplex S31803 / S32205 | 1.4462 |
The manufacturer and supplier of Super Duplex S32750/S32760 Forged Fittings provide these products in various shapes and sizes as per the client's requirements. These forged fittings are designed with remarkable properties, including high resistance, excellent workability, and welding capabilities, making them highly durable and reliable. They ensure a leakage-free process and offer outstanding toughness and a long-lasting life. All products come with the necessary test declarations and reports, adhering to international standards. The dimension standards for these fittings are ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97, BS3799, with sizes ranging from 1/8NB to 4 NB. The type is threaded fittings, with a compression rating of 2000/3000/6000 LBS. The specifications meet ASTM A182 / ASME SA182, ensuring superior flexibility and mechanical strength. Super Duplex S32750/S32760 Forged Fittings are considered ideal for demanding environments due to their ability to pass all necessary tests for international standards.
| STANDARD | WNR. |
|---|---|
| Super Duplex S32750 / S32760 | 1.4410 |
