Ninthore Overseas is one of the Leading Manufacturer And Exporter of Stainless Steel 304L Washers, which is additionally advantageous for top temperature service thanks to its sensible mechanical properties. These Stainless Steel 304L Flat Washers offers higher creep and stress rupture properties than Stainless Steel 304. Our SS 304L Lock Washer includes a rather improved corrosion resistance over completely different alloys of stainless steel in powerfully oxidizing environments as a result of the addition of metal (niobium) and number. These Stainless Steel 304L Sealing Washer doesn’t perform well in chloride solutions, even in tiny concentrations, or in sulphuric acid.

SS 304L Split Washer carries out intermittent heating between 800 Degree F (427 Degree C) and 1650 Degree F (899 Degree C), or for attachment below conditions that stop a post – weld temper. These Stainless Steel 304L Slot Washers can be hardened by heat treatment, solely by cold operating. Stainless Steel 304L Machine Washer may be simply welded and processed by commonplace search fabrication practices. These SS 304L Star Washers also contains niobium for stabilization against sensitization and resultants inter – granular corrosion.

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Restricted SS 304L Wire Spring Washers plus columbium stabilization permits welded fabrications to be used in corrosive environments, normally without post – weld heat treatment. These SS 304L Flat Spring Washer appears to fall between both the stainless and nickel categories as it contains characteristics of both.

SS 304L Washers Specifications
Specifications : ASTM A 193 ASME SA 193
Standard : DIN, ASTM, BS and all International Standards
Length : M02 to M33
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

304L Stainless Steel Washers Chemical Composition

Grade C Mn Si P S Cr Mo Ni N
304L min. 18.0 8.0
max. 0.03 2.0 1.00 0.045 0.03 20.0 12.0

Stainless Steel 304L Washer Mechanical Properties

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
304L 485 170 40 92 201

Equivalent Grades for 304L Stainless Steel Washer

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304L S30403 304S31 58E 1.4306 / 1.4307 X5CrNi18-10 2332 SUS 304L

SS 304L 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

304L Steel Washer 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)



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