EN41B

Grade Introduction:
En41B Alloy steel is a 1.5% Chromium Aluminum Molybdenum Nitriding Steel. En41B is a very popular grade of low carbon Manganese Free Cutting Steel, which is most suitable for the manufacture of repetition turned components, such as nuts, bolts, hydraulic fittings, and studs, particularly where intricate drilling and machining operations are involved. It can be case-hardened, producing components with enhanced wear resistance.

En41B Alloy steel is Chromium Aluminum Molybdenum Steel which is usually supplied in hardened and tempered condition. Properties of the steel combine high wear resistance together with toughness and ductility. It is defined by its suitability for nitriding from which 905M39 can give a hardware resistance case up to 68HRc. Suitable for applications requiring excellent resistance to wear and abrasion.

Equivalent Grades

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

Grade Application

EN41B is used for applications that require high wear resistance and abrasion in the automotive, textile, and general engineering industries.
Typical applications: connecting rods, small extrudes, valve stems, brick press plates, clutch plates, gudgeon, track and shackle pins, injection molding equipment, hydraulic cylinders, gears, and pinions, die inserts, valve and gate parts, cams, piston pins, etc.

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Chemical Composition

The following table shows the chemical composition of EN41B steel:

Element
C
Si
Mn
S
P
Cr
Mo
Al
Content (%)
0.35-0.45
0.10-0.45
≤0.65
≤ 0.035
≤ 0.035
1.40-1.80
0.10-0.25
1.90-1.30

Heat Treatment

Heat treatment temperatures, including the rate of heating, cooling, and soaking times will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities.

Hardness

Hardness: max 229HB

Hardening

930 – 970°C, water or oil quench.

Thermal Properties

Thermal Conductivity W/mK – 45
Coefficient of Thermal Expansion 0-250°C – 13.1

Forging Properties

850 – 1200°C, cooling as slowly as possible in the sand after forged.

Stress Relieving

If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalize, then cool slowly.

Welding

Not recommended.

Mechanical Properties

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

Physical Properties

DENSITY (G/CM 3)
8.08
DENSITY (LB/IN 3)
0.292
MELTING POINT (°C)
1425
MELTING POINT (°F)
2600

Tempering

600 – 650°C, Cooling in air.

Normalizing

930 – 970°C, Cooling in air.

Annealing

840 – 870°C, Cooling in the furnace.

Density

Density (G/CM 3) – 8.08.

Machinability

Readily machinable.

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

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Addition to other grades

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.