904L/1.4539 Stainless Steel Pipe

904L stainless steel Pipe (UNS N08904/EN 1.4539) is a high alloy austenitic stainless steel with a core composition of 19-23% chromium, 23-28% nickel, 4-5% molybdenum, and added copper (1-2%). Compared with 321/321H, 904L achieves superior corrosion resistance through its ultra-high molybdenum and copper content, especially resistant to sulfuric acid, phosphoric acid, and chloride corrosion, making it suitable for extreme environments such as chemical engineering, seawater treatment, and petroleum extraction.


Specification


International StandardASTM, AISI, JIS, ISO, EN, DIN, BS
Outer Diameter1/8″ – 80″ , DN6 – DN2000 , 10.3mm – 2032mm
Wall ThicknessSch 10, 40, 80, 160 &XXH
 Tube TypeSeamless or Welded(PLASMA+TIG)
Surface FinishPolishing, Annealing, Pickling, Bright
Technical TreatmentCold Rolled, Hot Rolled
Mill Test Certificate(MTC)EN10204 3.1
Test ContentFlange & Flaring Test,Reverse Flattening Test, Roughness Test, Hydrostatic/Pneumatic Test, Eddy Current Test (NDT), Surface Finish Verification, Dimensional Inspection, Material Certification
Certificate

TUV ISO 9001:2015 , PED 2014/68/EU , AD 2000-WO 

DIN EN ISO 9606-1 , DIN EN ISO 14732 Welder Certificate

EN ISO 9712 NDT Personnel Certificate EN ISO 15613 WPQR


Chemical Composition %


GRADECMnPSSiNiCrMoCu
904L

0.02

2.000.0450.0351.0023-2819-234-51-2


Mechanical Propertoes



Tensile Strength (MPa) minYield Strength 0.2% Proof (MPa) minElongation Longitudinal (%)Hardness(HR B)
904L4902053670-90 typical


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