904L Stainless Steel Round/Square Seamless Welded Pipe.Video

904L Stainless Steel Round/Square Seamless Welded Pipe.Video

 

904L stainless steel pipe (UNS N08904 / EN 1.4539) is a high-alloy austenitic stainless steel developed for exceptional corrosion resistance in harsh environments. Available in both seamless and welded forms, 904L pipe is designed for aggressive chemical processing, marine applications, and high-chloride environments like offshore oil & gas.

 

904L Stainless Steel Round/Square Pipe Standards

Category	Specification
Material Grade	904L (UNS N08904 / EN 1.4539)
Type	Austenitic stainless steel with low carbon and high alloy content
Forms	Round pipe, square pipe, seamless, welded
Manufacturing Standards	ASTM B677 (seamless), ASTM B673 (welded), ASTM B625 (plate for welded pipes)
Dimensional Standards	ASME B36.19M (for stainless steel pipes), EN 10216-5 (seamless), EN 10217-7 (welded)
OD Range (Round)	6mm – 630mm (customizable)
Wall Thickness	Sch 5S to Sch 160 / 0.5mm – 25mm
Length	6m standard, or custom up to 12m
Surface Finish	Annealed & pickled, polished (up to 600 grit), mirror finish, or custom
Welding Standard (for welded pipes)	ASTM A312/A358, GTAW/TIG/ERW/LASW as required
Chemical Composition	Cr: 19–23%, Ni: 23–28%, Mo: 4–5%, Cu: 1–2%, C: ≤0.02%
Corrosion Resistance	Excellent resistance to strong reducing acids like sulfuric acid
Typical Applications	Acid processing equipment, chemical tanks, seawater heat exchangers, oil & gas pipelines