1.4541/AISI 321

Quick Facts

EN 1.4541/ AISI 321 is a titanium stabilized austenitic stainless steel. The titanium content form carbide with the carbon which contributes to its post-weld resistance towards intergranular corrosion. For this, AISI 321 is often used in welded parts of chemical apparatus engineering. The corrosion resistance of AISI 321 is good in natural environmental media (rural waters and industrial atmosphere) whereby chlorine and salt concentrations and nitric or organic acids concentrations are low.

Typical Applications

  • Aerospace / Aviation
  • Automotive industry
  • Chemical Industry
  • Construction industry
  • Food industry
  • Mechanical Engineering

Industry Specifications

  • AISI 321 / SS 2337 / UNS 32100
  • ASTM A 240/ A 276
  • German Material no.: 1.4541
  • X6CrNiTi18-10

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

Chemical Analysis

Chemical Composition, %

1.4541/AISI 321

1.4541/AISI 321


The 321 exhibits good corrosion resistant in natural environment media (rural waters and industrial atmosphere) and most diluted organic acids at moderate temperatures but does not perform well in more corrosive media such as chlorine solutions or sulfuric acids. AISI 321 has lesser machinability but can be readily welded by most standard processes and post weld heat treatment is not necessary.

Weldability: good
Machinability: 3 (1 = poor – 10 = good)
Polishability: yes
Corrosion class: 3 (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