CHROMIUM MOLYBDENUM NITRIDING STEEL
Supplied in the hardened and tempered ‘R’ and ‘S’ condition, EN41 (905M39) is a chromium-aluminium-molybdenum engineering steel which is suitable for nitriding and once nitrided, offers a hard-wearing casing which is superior to EN40B. EN41 offers an excellent overall combination of wear and abrasion resistance. With high toughness and ductility, EN41 nitriding steel is used in the manufacture of die casting dies, clutch plates and shackle pins.
EN41 (905M39) in the ‘R’ condition offers a tensile of 700-850 N/mm² whilst EN41 in the ’S’ condition offers a tensile of 775-925 N/mm². Wear resistance after nitriding is 68HRc which is higher than EN40B.
EN41 (905M39) is supplied hardened and tempered in the R or S condition but subsequent nitriding affords numerous benefits. The process imparts a high wearing abrasion resistant surface which results in effective resistance to wearing, scuffing, galling and seizure. An added benefit of nitriding EN41 is that the fatigue resistance of the steel is also significantly increased. Whilst the nitriding process is time consuming, the performance enhancements it affords make EN41 an attractive material for use in a wide variety of commercial applications. Minimal distortion is also a positive result of the nitriding process.
EN41 (905M39) should be considered in applications where an even greater hard-wearing surface is required as once nitrided, it out performs another nitriding steel in our product range, EN40B. The welding of EN41 (905M39) is not recommended but machinability is good. EN41 can also be annealed if required.
EN41 (905M39) is supplied in the ‘R’ and ‘S’ condition. Commercial application examples include:
- Hydraulic cylinders
- Gears & pinions
- Die inserts, piston pins, cams
- Valve and gate parts
- Clutch plates, plates used in brick pressing equipment
- Connecting rods, die casting dies
- Rollers and ball joints