EN41B NITRIDING STEEL|41CRALMO7-DIN 1.8509

.EN41B is defined as Cr-Mo-Al Nitriding steel as per BS 970 Standard.This material can obtain high wear resistance,good toughness and ductility after nitriding which can give a hard wear resistant case up to 68HRC. After hardened and tempered,EN41B has a tensile strength of 700-850MPa in R condition,and 775-925MPa in S condition.  Typical applications for this steel are connecting rods, small extruders, valve stems, injection moulding equipment, hydraulic cylinders, gears, pinions, etc

Available Types & Range

Form of Supply Size(mm) Length(mm)
Round bar Φ 16 -Φ 140 Standard or As your request
Forged Rounds Φ 140  – Φ 650 Standard or As your request
Forged Flats Thickness : 65 – 450
Width: 130 – 650		 Standard or As your request

EN 41B – ROLLED

Size – 16 mm to 150 mm Dia

Brand – LSRM , JAILAXMI

EN 41B – FORGED ROUND

Size – 140 mm to 670 mm Dia

Brand – Kolkatta& Punjab Main Make

EN 41B – FORGED FLATS

Thickness : 65 – 450
Width: 130 – 650

Brand – Kolkatta& Punjab Main Make

Chemical Composition & Technical Specification EN 41 B

Grade C Si Mn P S Cr Mo Al
EN41B 0.35-0.45 0.1-0.45 ≤ 0.65 ≤ 0.05 ≤ 0.05 1.4-1.8 0.1-0.25 0.9-1.3
38CrMoAl 0.35-0.42 0.2-0.45 0.3-0.6 ≤0.035 ≤0.035 1.35-1.65 0.15-0.25 0.7-1.1

EN41B Mechanical Property With Quenching and Tempering condition

Tensile Strength,Mpa Yield Strength,Mpa Elongation,% Charpy Impact, J Brinell Hardness,HB
R Min 695 Min 525 Min 20 Min 40 201-255
S Min 772 Min 587 Min 19 Min 40 223-277
T Min 850 Min 680 Min 17 Min 35 248-302

.Heat Treatment & Mechanical Property

  • Normalizing:  930 – 970°C,Cooling in air
  • Annealing:840 – 870°C,Cooling in furnace
  • Hardening:880 – 910°C,oil quench
  • Tempering:550 – 720°C,Cooling in air
  • EN41B Tempering temperature Vs Hardness
    Tempering Temperature,℃ 150 200 300 400 500 550 600 650
    Hardness,HRC 56 55 51 45 39 35 31 20

Application:
EN41B Nitriding Steel 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.