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Stainless Steel 409 - 1.4512

This data sheet applies to hot and cold rolled sheet and strip.


Rail and road vehicles, container construction, warehouse and transportation equipment for the sugar industry, absorbing duct and coal mining.

Chemical Compositions*

Element % Present (in product form)
Carbon (C) 0.030
Silicon (Si) 1.00
Manganese (Mn) 1.00
Phosphorous (P) 0.040
Sulfur (S) 0.015
Chromium (Cr) 10.50 - 12.50
Molybdenum (Mo) 6 x (C+N) to 0.65
Iron (Fe) Balance
* Maximum value unless otherwise stated

Mechanical properties (at room temperature in annealed condition)

Product Form
Thickness (mm) Max 8 13.5
Yield Strength Rp0.2 N/mm2 Longitudinal 210
Transverse 220
Tensile Strength Rm N/mm2 380 - 560
Elongation min. in % A80mm1) <3mm (longitudunal + transverse) 25
A2) ≥3mm (longitudinal + transverse)
1) Values apply for test pieces with a gauge length of 80mm and a width of 20mm. Test pieces with a gauge length of 50mm and a width of 12.5mm can also be used.
2) Values apply for test pieces with a gauge length of 5.65 √So.

Reference data on some physical properties

Density at 20°C kg/m3 7.7
Thermal Conductivity W/m K at 20°C 220
200°C 210
400°C 195
Specific Thermal Capacity at 20°C J/kg K 460
Electrical Resistivity at 20°C Ω mm2 /m 0.60

Coefficient of linear thermal expansion 10-6 K-1 between 20°C and

100°C 10.5
200°C 11.0
300°C 11.5
400°C 12.0
500°C 12.0

Processing / Welding

Standard welding processes for this steel grade are:

  • TIG-Welding
  • MAG-Welding Solid Wire
  • Arc Welding (E)


Cold forming with a small degree of deformation is easily feasble at tempertaure higher than room temperature. Sharp bending parallel to rolling direction should be avoided. Plates with larger thicknesses and/or higher degrees of deformation should be preheated up to 200 to 400°C. If applicable, hot forming at 700 to 900°C could be necessary. The corrosion resistance is affected by hot forming or annealing colours after welding or scaling. These have to be removed by pickling (pickling solution), grinding or sand blasting. Only iron-free tools are allowed for these workings. Machining does not differ from machining of unallyed carbon steels with comparable respectively corresponding strength.


thyssenkrupp Materials (UK) Ltd
Cox’s Lane
Cradley Heath
West Midlands
B64 5QU

Important Note

Information given in this data sheet about the condition or usability of materials respectively products are no warranty for their properties, but act as a description. The information, we give on for advice, comply to the experiences of the manufacturer as well as our own. We cannot give warranty for the results of processing and application of the products.

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