Ferritic Stainless Steels

Ferritic stainless steels are stainless alloys or Iron – Chromium alloys with Chromium content between 10.5 to 30%. These steels are straight chromium steels containing little or no nickel. The absence of nickel provides a relatively stable cost base for this material compared to austenitic stainless steels. Ferritic stainless steel has properties similar to mild steel but with the better corrosion resistance. The most common of these steels are 12% and 17% chromium containing steels, with 12% used mostly in structural applications and 17% in housewares, laundry applications and sugar industry. Ferritic grades are used extensively in automotive requirements.

The Characteristics of the ferritic grades are:

  • Good corrosion resistance, but generally not as good as 304/316 Austenitic
  • Good ductility
  • Fully magnetic
  • Immune from chloride stress corrosion cracking
  • Not suitable for use in low temperature applications
  • Can’t be further hardened by heat treatment and only slightly further cold worked
  • Stable ferrite structure

Grade and Typical

409 – Heat resistant steel, easily formed and welded. Mainly used for automotive exhausts or welded applications where superior performance to galvanised steel is required.

446 – Used for severe heat resistant applications up to 1200°C. In recuperators, highly resistant to sulphidation and oil ash corrosion.

1.4003 – Good corrosion resistance and readily weldable it provides a cost effective choice for many structural applications where mild or low alloyed steels require regular repair or replacement.

  • Ferritic Stainless Steels
  • Ferritic Stainless Steels
  • Ferritic Stainless Steels
  • Ferritic Stainless Steels
Grade EN # AISI # UNS # EN Name BS #
VAL1LC S40940
VAL1NI 414 S41400
X7AL 1.4713 X10CRALSI7
X11L 1.4003 S41003 X2CRNI12/
X17AL 1.4742 X10CRALSI18/
X17L 1.4016 430 S43000 X6CR17 430S11/
X17M 1.4113 434 S43400 X6CRM017-1 434S20
X17MZ 1.4105 430F S43020 X6CRM0S17
X17NBL 1.4511 X3CRNB17
X17T 1.4510 430TI S43036
X17Z 430F S43020 X14CRM0S17
X18DZ XM-34 S18200
X24AL 1.4762 X10CRALSI25/
X25R 446 S44600
X182N 1.4521 444 S444000 X2CRM0TI18-2