Ninthore Overseas is one of the Leading Manufacturer And Exporter of High Quality Carbon Steel Washers, which shows slight corrosion (rust spotting) when left in water for a period of time or when water dries out on them. The blow starts with a high – oxygen gas mixture of, for instance, 80 percent oxygen and 20 percent argon, because there is still plenty of carbon in Carbon Steel Flat Washers with which oxygen prefers to combine. Chromium in Carbon Steel Lock Washers also induces ferromagnetism in steel which is not desired in some of the applications, where nickel also helps in countering this problem.

Our manufacturing unit for Carbon Steel Sealing Washers is capable of producing large and customized order from our client around the world. Ninthore Overseas is one of the pioneers manufacturing house and stockiest for high quality Carbon Steel Split Washers, which are high chromium carbon steels that are not as fully corrosion resistant in spite of their inclusion in the category of stainless steels.

Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers | Carbon Steel Washers

Elements in Carbon Steel Slot Washers have a strong influence on heat – treating; because they tend to slow the diffusion of atoms through the iron lattices and thereby delays the allotropic transformations. Improved hardenability in Carbon Steel Machine Washers is achieved by adding such elements as manganese, molybdenum, chromium, nickel, and boron.

Carbon Steel Washers Specifications
Specifications : ASTM F 844 ASME SF 844
Standard : IS, ASTM, BS and all International Standards
Length : 3 mm to 200 mm
Size : M02 to M33
Type : Flat Washer, Lock Washer, Sealing Washer, Split Washer, Slot Washer, Machine Washer, Star Washer

Carbon Steel Washer Chemical Composition

Element Carbon, max Manganese, max Phosphorus, max Sulfur, max
Grade A 0.29 % 1.20 % 0.04 % 0.15 %
Grade B 0.29 % 1.20 % 0.04 % 0.05 %

Carbon Steel Washer Mechanical Properties

Grade Tensile, ksi Yield, min, ksi Elong %, min
A 60 min 18
B 60 – 100 18
C* 58 – 80 36 23

Carbon Steel 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

CS 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)