Ninthore Overseas is one of the Leading Manufacturer And Exporter of Stainless Steel 347H Washers , where chromium is the most important alloying element. Above 12 % Cr steel forms a chromium oxide layer on its surface that gives SS 347H Flat Washer its unique resistance against atmospheric corrosion; depending on the individual grade, up to 30 % Cr is alloyed. Chromium increases the ability of Stainless Steel 347H Lock Washers to harden heat – treatable steels, and raises the tensile strength whilst the ductility is only slightly lowered. Used in heat – treatable steels up to 3.5 %, Cr in SS 347H Sealing Washer increases the effective hardening depth where large diameters or thicknesses are heat treated.

Decarburization of high pressure hydrogenation Stainless Steel 347H Split Washers is minimized by alloying up to 12 % Cr. Stainless Steel 347H Slot Washers is heat and scale resistant steels to create a firmly adhering oxide layer on the surface. In high – temperature of SS 347H Machine Washers, low amounts of aluminum increase the high – temperature strength.

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In low alloyed steels, Stainless Steel 347H Star Washer increases the ability to harden the steel and prohibits the temper brittleness of chromium and manganese alloyed heat treatable steels. In tool steels, the ability of SS 347H Spring Washer to induce carbides is used to increase abrasion resistance and tempering resistance.

SS 347H Washer Specifications
Specifications : ASTM A193 ASME SA193
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

347H Stainless Steel Washers Chemical Composition

Grade C Mn Si P S Cr Cb Ni Fe
SS 347H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 20.00 8xC – 1.10 9.00 – 13.00 63.72 min

Stainless Steel 347H Washer Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1454 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Equivalent Grades for 347H Stainless Steel Washer

SS 347H 1.4961 S34709 SUS 347H X6CrNiNb18-12

SS 347H 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

347H 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)


Stainless Steel 347H Washers

Ninthore Overseas is one of the Leading Manufacturer And Exporter of Stainless Steel 347H Washers, where chromium is the most important alloying element.

Product Brand: Ninthore Overseas

Product In-Stock: InStock

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