Ninthore Overseas is one of the Leading Manufacturer And Exporter of High Quality Duplex S31803 Washers, which has shown good formability in a variety of fabrications. Duplex S31803 Flat Washers is a variant stainless steel alloy that is primarily used in the oil and gas industry, particularly for offshore platforms, heat exchangers, structural components, and architectural components. The temperature range of Duplex S32205 Lock Washers is typically listed as -50 Degree C to 300 Degree C (-58 Degree F to 572 Degree F); outside of this range, its performance characteristics degrade. 

Duplex S31803 Sealing Washer is somewhat more difficult to machine than the 300 series austenitic stainless steels, where higher cutting forces are required and more rapid tool wear is typical. Specifically, the micro – components of Duplex S32205 Split Washers experience precipitation with prolonged exposure to high temperatures, and ductility suffers with immersion in extremely cold environments. Duplex S31803 Slot Washers for over 80 % of the total usage of Duplex stainless steels throughout the world is because of its superior workability as well as corrosion resistance.

Duplex S31803 Washers | Duplex S31803 Washers | Duplex S31803 Washers | Duplex S31803 Washers | Duplex S31803 Washers | Duplex S31803 Washers | Duplex S31803 Washers 

Along with very high tensile and yield strength ratings, Duplex S32205 Machine Washers resists stress corrosion cracking extremely well and is pitting resistant, highly weldable, and very versatile. We recommend a maximum hot forming temperature of these Duplex S31803 Star Washer between 2010 Degree F and 2100 Degree F (1100 Degree C to 1150 Degree C).

Duplex 31803 / S32205 Washer Specifications
Specifications : IS / BS / ASTM
Standard : ASTM / ASME – A/ SA 479 / 479
Length : M02 to M30
Size : 3 mm to 200 mm
Type : Flat Washer, Lock Washer, Sealing Washer, Split Washer, Slot Washer, Machine Washer, Star Washer SPRINGS – Wire Spring & Flat Spring

Duplex Steel S31803 / S32205 Washers Chemical Composition

S31803 / S32205 C N P Si Mn Mo Fe Cr S Ni
1.0 0.03 0.02 2.0 3.0 – 3.5 22.0 – 23.0 0.03 4.5 – 6.5 0.14 – 0.2 Bal

Duplex UNS S31803 / S32205 Washer Mechanical Properties

S31803 / S32205 Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
7.8 g/cm3 1350 °C (2460 °F) Psi – 80000 , MPa – 550 Psi – 116000 , MPa – 800 15 %

Equivalent Grades for UNS S31803 / S32205 Washer

Duplex S31803 S31803 1.4462
Duplex S32205 S32205 1.4462

Duplex UNS S31803 / S32205 Washers 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 Washers Test Certificates

We at Ninthore Overseas 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 Ninthore Overseas 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)


Duplex S31803 Washers

Ninthore Overseas is one of the Leading Manufacturer And Exporter of High Quality Duplex S31803 Washers, which has shown good formability in a variety of fabrications. 

Product Brand: Ninthore Overseas

Product In-Stock: InStock

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