Data Sheets

Stainless Steel   |   Ferritic

1.4509 (441) Sheet and Plate


Stainless steel producers have an ongoing programme of development designed to produce new grades. These new grades are sometimes developed for specific end uses and sometimes to improve upon an existing grade.

Type 1.4509 spans both of these two areas since it was developed for a particular range of applications in certain industries where it can be used in place of type 1.4301 (304). On some aspects, its properties and performance in service are actually superior to 304 whilst on others it falls between 430 and 304. Notably however, it is also lower cost than 304.

Type 1.4509 can be referred to as a 'Super-Ferritic'

~ Good for Deep Drawing
~ Good Weldability
~ Good pitting corrosion resistance
~ Good brightness
~ Polishes well

The main target sector is catering equipment to replace grade 304

~ 1250mm & 1500mm wide
~ Thicknesses 0.5mm to 2.0mm
~ Finishes Bright Annealed or Polished

Chemical Composition

EN 10088-2:2005
1.4509 Steel
Chemical Element % Present
Iron (Fe) balance
Sulphur (S) 0.02 max
Carbon (C) 0.03 max
Phosphorous (P) 0.04 max
Titanium (Ti) 0.1 - 0.6
Manganese (Mn) 1 max
Niobium (Columbium) (Nb) 1 max
Silicon (Si) 1 max
Chromium (Cr) 17.5 - 18.5

Alloy Designations

Stainless Steel Grade 1.4509 is similar to but not a direct equivalent to:

Type 441 

UNS 43940 / S43932

Uginox F18TNb

Supplied Forms

  • Sheet
  • Plate
  • Tube

Generic Physical Properties

Physical Property Value
Density 7.70 g/cm³
Melting Point 1505 °C
Thermal Expansion 11.0 x10^-6 /K
Modulus of Elasticity 220 GPa
Thermal Conductivity 25.0 W/m.K
Electrical Resistivity 0.60 x10^-6 Ω .m

Mechanical Properties

EN 10088-2:2005
Sheet & Plate - Up to 8mm Thick
Mechanical Property Value
Proof Stress 230 Min MPa
Tensile Strength 430-630 MPa
Elongation A50 mm 18 Min %

Properties listed above are for 1.4509 Sheet & Plate