EN41 Alloy Steel Rod/Tube

Grade Introduction:

En41B Alloy steel is a 1.5% Chromium Aluminum Molybdenum Nitriding Steel. En41B is a very popular grade of low carbon Manganese Free Cutting Steel, which is most suitable for the manufacture of repetition turned components, such as nuts, bolts, hydraulic fittings, and studs, particularly where intricate drilling and machining operations are involved. It can be case-hardened, producing components with enhanced wear resistance. En41B Alloy steel is Chromium Aluminum Molybdenum Steel which is usually supplied in hardened and tempered condition. Properties of the steel combine high wear resistance together with toughness and ductility. It is defined by its suitability for nitriding from which 905M39 can give a hardware resistance case up to 68HRc. Suitable for applications requiring excellent resistance to wear and abrasion.

Grade Application:

EN41B is used for applications that require high wear resistance and abrasion in the automotive, textile, and general engineering industries.
Typical applications: connecting rods, small extrudes, brick press plates, clutch plates, gudgeon, track and shackle pins, injection molding equipment, hydraulic cylinders, gears, and pinions, die inserts, valve and gate parts, cams, piston pins, etc.

Equivalent grades:   BS 970:1955 :EN24T. BS 970:1991 :817M40T

Chemical composition:

The following table shows the chemical composition of EN41B steel:

Mechanical Properties:

 Finishing rolling process: 

Finishing rolling is a process to obtain higher precision and better surface quality by rolling the heat-treated seamless steel pipe multiple times. The specific steps include: heat treatment - pickling - cooling - finishing rolling - sizing - cutting - length - inspection - packaging. Finishing rolling can improve the precision, surface quality and mechanical properties of steel pipe.

Cold drawing process: 

Cold drawing is a process of drawing the heat-treated seamless steel pipe one by one in a cold state to obtain high precision, high surface quality and high mechanical properties. The specific steps include: heat treatment - pickling - cooling - cold drawing - deoxygenation - wet pickling - cold water washing - leveling - straightening - pickling - cold water washing - oxide skin - cold drawing - sizing - straightening - pickling - cold water washing - deoxygenation - polishing - inspection - packaging. Cold drawing can significantly improve the dimensional accuracy, surface quality and mechanical properties of steel pipes.

Hot rolling production process: 

Hot rolling is the process of heating the blank to a certain temperature, and then forming it into seamless steel pipe through multiple rolls. The specific steps include: heating - rolling - roll probe - sizing - cooling - trimming - rod breaking - inspection - packaging. Hot rolling can produce seamless steel pipes with large diameters and wall thickness, but the accuracy and surface quality are not as good as fine rolling and cold drawing.

These three processes have different applications in the production of seamless precision steel pipes, and the specific choice depends on the required dimensional accuracy, surface quality and mechanical properties.