Nitriding Steel - En41b Chromium-aluminium-molybdenum Alloy | Excellent Wear Resistance, High Toughness & Ductility

En41b

EN41b is a chromium-aluminium-molybdenum nitriding steel usually supplied in the hardened and tempered condition. EN41 is supplied in round bar from stock and can be cut to your requirements. It offers high wear resistant properties together with toughness and ductility. It is defined by its suitability for nitriding from which EN41 can give a hard wear resistant case up to 68HRc, better than achievable with the similar nitriding grade EN40B..

EN41b is suited for applications that required excellent resistance to wear and abrasion. Typical applications include connecting rods, small extruders, valve stems, dies. It is widely used in the automotive, textile and general engineering industries. Suitable for applications requiring a resistance to wear, it is also suitable for other applications such as brick press plates, clutch plates, gudgeon, track and shackle pins.

Key Feature

• Nitriding steel
• Excellent wear & abrasion resistance
• High toughness & ductility
• Harder wearing than EN40B

Chemical Composition

Hardening

EN41b is supplied ready heat treated. If further heat treatment is required annealed EN41 should be heated slowly to 870-930C and after adequate soaking at this temperature quench in oil/polymer or water. Temper as soon as tools reach room temperature.

Tempering

Heat carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 580-700C). Soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in the air.