Corrodur 4034 is characterised by its high hardenability in conjunction with good corrosion resistance in moderately corrosive environments. Due to its higher carbon content, it is more hardenable than 1.4031. It is used in the quenched and tempered condition and due to its high hardness, is ideally suited for the production of cutting tools and the production of roller bearings.
Hardness, HBW HBW
241 [-] at 20 °C
Tensile strength Rm
800 MPa at 20 °C
Coefficient of thermal expansion α
1.051E-5 1/K at 100 °C
12.5 - 14 %
Medical and Pharmaceutical industry, Roller Bearings, Mechanical Engineering, Cutlery, Blade and Tool Industry
Average - Good corrosion resistance in moderately corrosive environments that are free of chlorides, such as soaps, detergents and organic acids. Good resistance to water and steam. 1.4034 is not resistant to intergranular corrosion in the as-delivered or as-welded conditions. Due to the precipitation of chromium carbides and the formation of chromium depleted regions adjacent to these precipitates, 1.4034 should not be used in the soft annealed or over tempered conditions if corrosion resistance is an issue. Optimal corrosion resistance is thus achieved in the hardened condition with a polished surface finish.
Poor - The machinability of this grade of stainless steel is directly related to its hardness. 1.4034 machines similar to carbon steels of the same hardness. Although it must be realised that the machining parameters will vary depending on the structure/hardness of the steel.
This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).