Duplex Steel S31803 Hydraulic Fittings Manufacturer

Sachiya Steel International Is One Of The Leading Manufacturer And Exporter Of High Quality Duplex Steel S31803 Hydraulic Fittings, which has superior resistance to chloride pitting and crevice corrosion as compared to 317L stainless steel. Duplex Steel S31803 Hydraulic Fittings is a duplex grade with a ferrite – austenitic microstructure, which further consists of around 40 % – 50 % ferrite in the annealed condition. The microstructure of Duplex Steel S32205 Hydraulic Fittings has the high strength of the ferrite grades whilst retaining the corrosion resistance of the austenitic grades. Duplex S31803 Hydraulic Type Fittings is not uncommon to see the metal used as a practical solution to chloride – induced stress cracking, which is the Achilles’ heel of stainless steel.

Duplex Steel S31803 Hydraulic Fittings

Duplex S32205 Hydraulic Type Fittings has outstanding corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, Duplex Stainless Steel S31803 Forged Hydraulic Fittings is also resistant to sulphide stress corrosion cracking (sour – gas environments). The high quality and therefore performance of Duplex Stainless Steel S32205 Forged Hydraulic Fittings is widely attributed to the high levels of chromium present as well as nitrogen and molybdenum.

UNS S31803 Hydraulic Fittings offer faster machining speeds, longer tool life, improved part quality, and lower total cost of machined parts. UNS S32205 Hydraulic Fittings are nonmagnetic in the annealed condition but may become slightly magnetic as a result of cold working or welding.

Duplex Steel S31803 / S32205 Hydraulic Fittings Specifications
Specifications : ASTM A182 / ASME SA182
Tube Fittings SIZE : 1/16”OD to 2”OD, 2mm OD to 50mm OD
Thread : NPT, BSP, BSPT, UNF, ISO, SAE etc.
Pressure Rating
: 6000PSI for Stainless Steel, 300/1000/3000PSI for Brass
Brass : ASTM B16 ASTM B 453
Ptfe Standards : ASTM D1710, ASTM D3294
Applicable Temperature : 150-400°C
Type : Single Ferrule tube fitting, Double Ferrule tube fitting, Hydraulic tube fitting, Instrumentation tube fitting
Duplex Steel S31803 / S32205 Hydraulic Fittings Chemical Composition
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
Duplex Steel S32205 Hydraulic Fittings Mechanical Properties
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
Equivalent Grades for Duplex S31803 / S32205 Hydraulic Tube Fittings
Duplex 2205 1.4462 S31803 / S32205
Duplex Steel S31803 / S32205 Hydraulic Fittings Application Industries
  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry
Duplex Steel S31803 / S32205 Hydraulic Tube Fittings Test Certificates

We at Sachiya Steel International provide Manufacturer TC (Test Certificate) in accordance to EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report. We also provide Standard certificates like EN 10204 3.1 and additional requirement like. NACE MR 01075. FERRIT CONTENT as per norms if requested by clients.

• EN 10204/3.1B,
• Raw Materials Certificate
• 100% Radiography Test Report
• Third Party Inspection Report, etc

Material Testing

We at Sachiya Steel International ensure that all our materials go through strict quality tests before dispatching them to our clients.

• Mechanical Testing Such as Tensile of Area
• Hardness Test
• Chemical Analysis – Spectro Analysis
• Positive Material Identification – PMI Testing
• Flattening Test
• Micro and Macro Test
• Pitting Resistance Test
• Flaring Test
• Intergranular Corrosion (IGC) Test


• Commercial Invoice which includes HS Code
• Packing List including net weight and gross weight, number of boxes, Marks and Numbers
• Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
• Fumigation Certificates
• Raw Material Test Reports
• Material Traceability Records
• Quality Assurance Plan (QAP)
• Heat Treatment Charts
• Test Certificates certifying NACE MR0103, NACE MR0175
• Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2
• Guarantee Letter
• NABL approved Laboratory Test Reports
• Welding Procedure Specification/Procedure Qualification Record, WPS/PQR
• Form A for the purposes of the Generalized System of Preferences (GSP)

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