Stainless steel Grade A240 (UNS S43940)

Topics Covered

Chemical Composition
Mechanical Properties
Other Designations


Stainless steel grade A240 has a crystal structure that is ferritic, and hence this material is ferromagnetic in soft annealed condition. The high chromium content in this steel helps in replacing standard austenitic grades in certain applications.

The following datasheet provides an overview of stainless steel grade A240.

Chemical Composition

The chemical composition of stainless steel grade A240 is outlined in the following table.

Element Content (%)
Chromium, Cr 18
Titanium + Niobium 0.6
Carbon, C 0.02
Iron, Fe Remainder

Mechanical Properties

The mechanical properties of stainless steel grade A240 are displayed in the following table.

Properties Metric Imperial
Tensile strength (annealed) 430Nmm2 62366 psi
Yield strength (@strain 0.200 %) 250 Nmm2 36259 psi
Modulus of elasticity 220 GPa 31908 ksi
Elongation at break 18 % 18 %

Other Designations

Equivalent materials to stainless steel grade A240 are EN 10088-2:2005 and EN 1.4509.


Stainless steel grade A240 is primarily used in tubular products for automotive industry and for process equipment like heat exchangers.

The other applications of stainless steel grade A240 are as follows:

  • Architectural applications such as elevators and door frames
  • Various structures in catering and household areas


  1. Mohammad Azizul Mohammad Azizul Malaysia says:

    can u tell me this A240 is requirement for painting or not?

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