Ninthore Overseas is one of the Leading Manufacturer And Exporter Of High Quality Stainless Steel 446 Pipe Fittings, which is subject to stress corrosion cracking in hot, a concentrated caustic alkali. When stainless steel compounds are present as well, or for ammonium hydroxide service, these Stainless Steel 446 Compression Pipe Fittings is suggested. To avoid stress corrosion cracking, our Stainless Steel 446 Ferrule Pipe Fittings fabrication should be fully stress relieved prior to use. A minimum treatment of 1650 Degree F for 1 hour is suggested in our SS 446 Double Ferrule Pipe Fittings, but 1800 Degree F – 1850 Degree F for 1 hour preferred.

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This Stainless Steel 446 Accessories is a high strength nickel base super – alloy used for cryogenic temperatures up to long term service at 1200 Degree F. Our 446 Stainless Steel Compression Pipe Fittings is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. These 446 Stainless Steel Ferrule Pipe Fittings will show a contraction after precipitation hardening, where annealing is done at 1700 Degree F – 1850 Degree F, and then air cool or faster.

Stainless Steel 446 Pipe Fittings

Stainless Steel 446 Pipe Fittings

Our 446 Stainless Steel Double Ferrule Pipe Fittings is a low carbon, high purity, nitrogen-bearing “super-austenitic” stainless alloy. These 446 SS Accessories was designed to be a seawater resistant material and has since been demonstrated to be resistant to a broad range of very corrosive environments.

Stainless Steel 446 Pipe Fittings / Accessories Specifications
Specifications : ASTM A182 ASME SA 182
Tube Size : 1/16”OD to 2”OD, 2mm OD to 50mm OD
Pressure Rating : 6000PSI for Stainless Steel, 300/1000/3000PSI for Brass
SS 446 Pipe Fittings 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 Accessories 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 Pipe Fittings
SS 446 1.4762 S44600 SUS 446
S 446 Pipe Fittings / Accessories 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
Stainless Steel 446 Pipe Fittings / Accessories 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)