1.4462/SUS 329J3L

Quick Facts

EN 1.4462 (UNS S31804) is a corrosion and acid resistant austenitic-ferritic chrome-nickel-molybdenum steel, also known as duplex stainless steel. The nickel content is lower than in conventional corrosion resistant austenitic steel, which makes it stands out on economic point of view. Due to its duplex austenite and ferrite microstructure, 1.4462 duplex is superior to austenitic steels regarding intergranular corrosion and stress corrosion. The duplex grade is magnetic.

Typical Applications

  • Chemical industry
  • Construction industry
  • Mechanical Engineering
  • Oil and gas industry
  • Offshore and subsea application
  • Shipbuilding

Industry Specifications

  • UNS S31803 / SUS329J3L / STS329J3LTP / SS2377/ AISI 318 LN / Z3CND22-05Az
  • ASTM A182F51 / A 276 / B625
  • German Material no.: 1.4539
  • X2CrNiMoN22-5-3

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

Chemical Analysis

Chemical Composition, %

1.4462/SUS 329J3L

1.4462/SUS 329J3L


The 1.4462 exhibits excellent corrosion resistance in acid environments and in media that contain chloride, such as sea water, steam, sulphuric acid, nitric acid etc.). It has high resistance to intergranular, pitting and stress corrosion cracking. Mechanical properties are very good – high hardness and yield strength, while machinability and weldability are difficult for this material.

Weldability: fair
Machinability: poor
Polishability: yes
Corrosion resistance: excellent

Stock Range

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