EN41B steel is a nitriding steel which has at least 1.4%Cr,0.9%Al,and 0.1%Mo as strengthening elements. It will obtain high wear & abrasion resistance,high toughness,and excellent ductility after nitrided.EN41B is defined by its suitability for nitriding from which can give material a hard wear resistant case up to 68HRC, better than nitriding grade EN40B.It is generally supplied with annealed condition.
1.Supply Form & Size & Tolerance
Hot rolled round bar:Φ20-Φ200mm,Length:3000-6000mm
Hot Forged round bar:Φ130-Φ1000mm,Length:3000-10000mm
Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm
|Surface Finish||Black-Forged||Black-Rolled||Turned||Grinding||Polished||Peeled||Cold Drawn|
|Tolerance||(0，+5mm)||(0，+1mm)||(0，+3mm)||Best h9||Best h11||Best H11||Best H11|
|EN41B||0.35-0.45||0.1-0.45||≤ 0.65||≤ 0.035||≤ 0.035||1.4-1.8||0.9-1.3||0.1-0.25|
4. Mechanical Property
|Condition||Tensile Strength,Mpa||Yield Strength,Mpa||Elongation, %||Izod,KCV J||Hardness,HB|
|Mechanical Property at Quenched and Tempered condition|
|Tensile Strength,Mpa||Yield Strength ,Mpa||Elongation, %||Reduction of Area,%||Impact,J|
EN41B steel forging temperature:850 – 1200°C ,cooling as slowly as possible in sand after forged.
- Normalizing: 930 – 970°C,Cooling in air
- Annealing:840 – 870°C,Cooling in furnace,Hardness:max 229HB
- Hardening:930 – 970°C,water or oil quench
- Tempering:600 – 650°C,Cooling in air
- Nitriding: 500-600°C. Hardness after nitridng is 1000-1100HV.
EN41B is used for applications which requires high wear resistance and abrasion in the automotive, textile and general engineering industries.
Typical applications: connecting rods, small extruders, valve stems, brick press plates, clutch plates, gudgeon, track and shackle pins,injection moulding equipment, hydraulic cylinders, gears and pinions, die inserts, valve and gate parts, cams, piston pins, etc.