Ninthore Overseas Is One Of The Leading Manufacturer And Exporter Of High Quality Stainless Steel 304 Nipple, which is the standard molybdenum – bearing grade and second in importance to 316 amongst the austenitic stainless steels. Stainless Steel 304 Hexagon Reducing Nipple is the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation); as a result, it is extensively used in heavy gauge welded components. Stainless Steel 304 Hexagon Nipple is usually regarded as the standard “marine grade stainless steel”, but it is not resistant to warm sea water. Stainless Steel 304 One End Threaded Nipple has good oxidation resistance in intermittent service to 870 Degree C and in continuous service to 925 Degree C.

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Stainless Steel 304 Nipple

Stainless Steel 304 Nipple

Continuous use of Stainless Steel 304 Both End Threaded Nipple in the 425 Degree C – 860 Degree C range is not recommended if subsequent aqueous corrosion resistance is important. In many marine environments, Stainless Steel 304 Concentric Swaged Nipple does exhibit surface corrosion, usually visible as brown staining. Stainless Steel 304 Eccentric Swaged Nipple, with its higher carbon content has application at elevated temperatures.

The molybdenum gives 304 Stainless Steel Nipple better overall corrosion resistant properties, particularly higher resistance to pitting and crevice corrosion in chloride environments. Alloy 304 Nipple has excellent forming and welding characteristics, which is particularly associated with crevices and rough surface finish. The austenitic structure also gives Grade 304 Nipple excellent toughness, even down to cryogenic temperatures.

Stainless Steel 304 Nipple
Specifications : ASTM A182 & ASME SA182
Size : 1/4″ to 4″
Class : 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
SS 304 Nipple Chemical Composition
Grade C Mn Si P S Cr Mo Ni N
304 min. 18.0 8.0
max. 0.08 2.0 0.75 0.045 0.030 20.0 10.5 0.10
Stainless Steel 304 Nipple 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
304 515 205 40 92 201
Equivalent Grades for 304 Stainless Steel Nipple
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304 S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
Stainless Steel 304 Nipple 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
SS 304 Nipple 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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