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Stainless Steel 441 - 1.4509

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

Application

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

Chemical Compositions

Element % Present (in product form)
Carbon (C) 0.03
Silicon (Si) 1.00
Manganese (Mn) 1.00
Phosphorous (P) 0.040
Sulfur (S) 0.015
Chromium (Cr) 17.5 - 18.5
Titanium (Ti) 0.10 - 0.60
Niobium (Nb) (3xC+0.30) to 1.00
Iron (Fe) Balance
Maximum values unless otherwise stated

Mechanical properties (at room temperature in annealed condition)

Product Form
Product Form C
Thickness mm Max 8
Yield Strength Rp0.2 N/mm2 Longitudinal 230
Transverse 250
Tensile Strength Rm N/mm2 430 - 640

Reference data on some physical properties

Density at 20°C kg/m3 7.7
Thermal Conductivity W/m K at 20°C 25
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 10.0
200°C 10.0
300°C 10.5
400°C 10.5
500°C -

Processing / Welding

Standard welding processes for this steel grade are:

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

Processing

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.

Remark

In quenched condition the material can be slightly magnetizable. With increasing cold forming the magnetizability increases. Heat resisting tubes are delivered regarding testing in accordance to DIN EN 10296-2 respectively DIN EN 10297-2. In Germany, SEW 470 still applies for heat resisting tubes.

Editor

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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