EN41B Steel | 41CrAlMo7 |1.8509|SACM645

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.

EN41B Steel 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 Steel Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Al	Mo
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

EN41B Steel Relevant Standards

Germany	UK	China	Japan	France
41CrAlMo7/1.8509 34CrAlMo5/1.8507	905M39/905M31	38CrMoAl	SACM645	40CAD6.12 /30CAD6.12

EN41B Steel Mechanical Property

Condition	Tensile Strength,Mpa	Yield Strength,Mpa	Elongation, %	Izod,KCV J	Hardness,HB
R	700-850	480	16	28	201-255
S	775-925	525	14	16	223-277

Mechanical Property at Quenched and Tempered condition
Tensile Strength,Mpa	Yield Strength ,Mpa	Elongation, %	Reduction of Area,%	Impact,J
980	835	14	50	71

EN41B Steel Forging

EN41B steel forging temperature:850 – 1200°C ,cooling as slowly as possible in sand after forged.

EN41B Steel Heat Treatment

• 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 Steel Application

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.