Ninthore Overseas is one of the Leading Manufacturer And Exporter Of High Quality Stainless Steel 904L Pipes, where the Aluminium addition allows for the formation of a continuous homogenous self-repairing subscale. These Stainless Steel 904L Seamless Pipes may be hot-worked in the temperature range 1200 Degree C to 900 Degree C (2190 Degree F to 1650 Degree F), followed by water quenching or rapid air cool. As with our Stainless Steel 904L Welded Pipes, do not attempt to form in the 600 Degree C – 800 Degree C (1100 Degree F – 1500 Degree F) temperature range. Do not heat these Stainless Steel 904L EFW Pipes, or any other alloy, with a torch to bend it, because the lack of temperature control will often result in cracking.

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Stainless Steel 904L Pipes

Stainless Steel 904L Pipes

Chromium (25 %) supplemented with Aluminium (2.2 %) and micro – alloying addition (0.1 %) yttrium in our Stainless Steel 904L ERW Pipes form a very thin protective oxide scale. The addition of yttrium in these Stainless Steel 904L Round Pipes improves the adhesion and spalling resistance of the chromium and Aluminium oxide scales.

For heavier joints in our Stainless Steel 904L Square Pipes, it is recommended to use gas from Air Gas which was designed to reduce the likelihood of weld solidification cracks. For GTAW welding of these Stainless Steel 904L Rectangular Pipes, the use of Argon and Nitrogen for the shielding gas is suggested to minimize the likelihood of weld solidification cracking.

SS 904L Seamless Pipes Specifications
Specifications : ASTM B673, B677 /  ASME SB673, SB 677
Dimensions : ASTM, ASME and API
SS 904L Pipes : 1/2″ NB – 16″ NB
ERW 904L Pipes : 1/2″ NB – 24″ NB
EFW 904L Pipes : 6″ NB – 100″ NB
Size : 1/8″NB TO 30″NB IN
Specialized in : Large Diameter Size
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type : Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form : Round, Square, Rectangular, Hydraulic Etc
Length : Single Random, Double Random & Cut Length.
End : Plain End, Beveled End, Treaded
904L Stainless Steel Pipe Available Sizes
NB Sizes Sch 5 Sch 10 Sch 40 Sch 80 Sch 160
1 1/4″
1 1/2″
2 1/2″
904L Stainless Steel Pipes Chemical Composition
Grade C Mn Si P S Cr Mo Ni N
904L min. 19.0 4.00 23.00 0.10
max. 0.20 2.00 1.00 0.045 0.035 23.0 5.00 28.00 0.25
Stainless Steel 904L Pipe 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
904L 490 220 35 70-90 typical
Stainless Steel 904L Pipes Physical Properties
Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
904L 8000 200 15.0 13.0 500 850
Equivalent Grades for 904L Stainless Steel Pipe
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
904L N08904 904S13 X1NiCrMoCu25-20-5 1.4539 SUS 890L
SS 904L Seamless / Welded Pipes 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
904L Steel Pipes 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)