1.4539/AISI 904L

Quick Facts

EN 1.4539/ AISI 904L (UNS N08904) is a stainless, super austenitic nickel-chromium-molybdenum-copper steel that is resistant to many organic and inorganic acids. AISI 904L is often used in shipbuilding and for components used in seawater and brackish water due to its excellent corrosion resistance. AISI 904L can be used in seawater up to 70°C, in sulfuric or phosphoric acid and in places containing chloride. Often used in chemical industry, fertilizer, medical and pharmaceutical industry as well.

Typical Applications

  • Chemical industry
  • Construction industry
  • Fertilizer industry
  • Water turbine components
  • Pump shafts
  • Medical and pharmaceutical industry

Industry Specifications

  • AISI 904L / SIS 2562 / SS 2562 / UNS N08904 / AFNOR Z2NCDU25-20
  • ASTM A 240 / A 276 / B 625
  • German Material no.: 1.4539
  • X1NiCrMoCu25-20-5

Material may also be supplied against Customer specifications, subject to enquiry.

Chemical Analysis

Chemical Composition, %

1.4539/AISI 904L

1.4539/AISI 904L


The 904L exhibits excellent corrosion resistance due to it high alloy contents such as Nickel, copper, molybdenum and low carbon content. It has high resistance to pitting and stress corrosion cracking. Grade 904L is non-magnetic, and offers excellent formability, toughness and weldability.

Weldability: good
Machinability: 5 (1 = poor – 10 = good)
Corrosion class: 5 (0 = poor – 5 = good)

Stock Range

We supply a range of flat bars and round bars, on both stock and indent basis.
Primarily manufactured in: Europe, US