EN41B
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.
EN41B Grade Application:
- Connecting rods
- Small extruders
- Valve stems
- Brick press plates
- Clutch plates
- Gudgeon pins
- Track and shackle pins
- Injection molding equipment
- Hydraulic cylinders
- Gears and pinions
- Die inserts
- Valve and gate parts
- Piston pins
EN41B Equivalent Grades:
| Internal Standard |
BS |
| EN24T |
BS 970:1955 |
| 817M40T |
BS 970:1991 |
EN41B Chemical Composition:
| 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 |
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 |
Thermal Properties:
| Property |
Value |
| 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.