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Alloy 904L (Wst 1.4539)


Technical Data Sheet

 

Chemical Composition Limits
Weight% Ni Cr Mo Cu Mn Si S C N
904L 23-28 19-23 4-5 1-2 2 max 1 max 0.035 max 0.020 max 0.10 max

Alloy 904L is an austenitic stainless steel intended for use under severe corrosion conditions, with a very good resistance to attacks in acidic environment, as sulphuric, phosphoric and acetic acid. Very good resistance to pitting corrosion, stress corrosion cracking and a much better resistance to crevice corrosion than steels of alloy 304L and alloy 316L. Used for chemical processing, pollution control equipment, oil and gas well piping, heat exchangers, acid production and pickling equipment.

Typical Mechanical Properties

 

Alloy Tensile Strength MPa Yield Strength (0.2% Offset) MPa Elongation (%)
Alloy 904L Tube 500-700 200 40

Availability
Alloy 904L is available in Instrument tube, Precision tube and Hydraulic tube. On request Alloy 904L Coiled Tube can be supplied with a stainless steel seamless and welded execution. For all stock availability contact Sales.

Specifications
WS 1.4539
AFNOR Z2CNDU 25-20
UNS N08904
  
Services
At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (aog@aircraftmaterials.com).

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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