Ninthore Overseas Is One Of The Leading Manufacturer And Exporter Of High Quality Stainless Steel 446 Nipple, which offers good resistance to polythionic acid stress corrosion cracking and is also encountered in oil refineries. These SS 446 Hexagon Reducing Nipple is the original “18 – 8” stainless and is produced in greater quantity than any other austenitic stainless steel. Our Stainless Steel 446 Hexagon Nipple provides useful resistance to corrosion in many environments ranging from moderately reducing to moderately oxidizing. Through the controlled addition of nitrogen, it is common for this Stainless Steel 446 One End Threaded Nipple to meet the mechanical properties of 304 straight grades.

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Stainless Steel 446 Nipple

Stainless Steel 446 Nipple

Our Stainless Steel 446 Both End Threaded Nipple has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments. This Stainless Steel 446 Concentric Swaged Nipple is stabilized with columbium and is preferable for aqueous and low temperature environments due to its good resistance to inter – granular attack.

The high temperature oxidation resistance of our Stainless Steel 446 Eccentric Swaged Nipple is similar to that of stainless steel 304, which is useful to 1500 Degree F and also has good creep strength up to 1500 Degree F. These 446 Stainless Steel Nipple is an age – harden able iron base super – alloy for applications requiring high strength from -320 Degree Fahrenheit up to 1000 Degree Fahrenheit long time, 1300 Degree Fahrenheit – 1500 Degree Fahrenheit short time.

Stainless Steel 446 Nipple
Specifications : ASTM A182 & ASME SA182
Size : 1/4″ to 4″
Class : 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
SS 446 Nipple Chemical Composition
Grade C Mn Si P S Cr MO Ni N
446 min. 23.0 0.10
max. 0.20 1.5 0.75 0.040 0.030 30.0 0.50 0.25
Stainless Steel 446 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
446 485 275 20 92 201
Equivalent Grades for 446 Stainless Steel Nipple
SS 446 1.4762 S44600 SUS 446
Stainless Steel 446 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 446 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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